I am in my third semester of nursing school. This incident occurred the 4th week of my medsurg clinical rotation. Up to this point, I had received all satisfactories on my clinical evaluation and no negative comments. I have always received outstanding reviews from my previous CIs.Ok so to the problem, it was my first and only turn to pass meds this rotation. I would like to add this was my first time doing an IV flush/push or using a needless syringe in general. The patients RN pulled all the meds and my CI placed them in a black pencil holder. We went over the meds in the holder and compared them to the MAR in the hallway. MY patient had an IV med that I needed to draw up. My teacher told me to draw up the med in the hallway so I did, then I removed the needle from the syringe. I carried the black pencil holder with meds inside in one hand and the needless syringe in the other.I lay the bag down next to the computer. (The MAR was already pulled up from before we left the room.) My CI pulls the meds out of the holder(most were PO, one was subcut, and then a NS and Heparin flush). I lay the needless syringe we had drawn up next to the meds. My teacher proclaims "What is this?!" I point to the now empty vile we used to fill it up in the hallway. she stated, "you never ever do this. this is a huge no no. YOu cannot do this..." I immediately felt awful but honestly I was unsure of what I did wrong. I almost felt that since she said "what is this" she had forgotten we drew it up in the hallway together. So I thought I should have labeled it because I remembered reading/learning in class to label syringes you draw up. That is all I thought I did wrong. Then we scan the drugs laying on the countertop in no particular order. My teacher was going so fast I wasn't really able to make sure we had scanned everything. It's like she knew what she was scanning, and didn't want to wait for me to read the drug name and make sure it was there. I honestly felt like she was doing it all and was just going to let me administer them. Then she checks the blood return and lets me admin the normal saline...she stands behind me at the computer and hands everything to me over my shoulder. We finish that procedure and she says next I would give the subcut then do the PO and she leaves the room with the bag and I complete their meds. It all felt very rushed. I left thinking what just happened?! (in regards to the IV push) The whole time she was just handing me stuff and I didn't have time to stop and think what I was really doing. I wouldn't have known if she had given me the wrong med it was happening so fast. A few hours later she walks in to the room holding the black pencil pouch and asks if the patient was on ibuprofen. I say yes. She checks the MAR and comes back and says you forgot to give this so I immediately give it. So that was my day...Now fastforward to my clinical evaluation ticket. She gave me one S and the rest were S- which technically she can't even do its either an S or U. Her comment stated that I failed to cap or label a syringe. I forgot to give a med at the schedule time and I didn't finish charting before I left for lunch. She stated that I was halfway through my rotation and needed to step it up to meet basic requirements. I really took it personally because if we are almost done with the rotation why is she jut now saying I need to step it up. Why didn't she say anything to me previously?I was at a loss for words. I went home and cried. I spoke with some of the other students in my clinical who had done IV meds and they said they didn't label the syringe. THey also stated they didn't usually chart the assessment until after lunch. This was the first week I hadn't completely charted my assessment before lunch. I didn't think it was a necessity to cap the syringe if I was immediately going to give it to the patient.I didn't even realize I should have done it until she wrote it in my evaluation. Being my first time doing anything with needless syringes, why didn't she walk me through the procedure slower? Why didn't she tell me in the hallway to cap it and label it as a reminder? I honestly feel like she was setting me up for failure. Why did she wait til after to reprimand me instead of reminding me while I was preparing the syringe to teach me the importance of these things. As far as the medication admin error, I didn't get to check the black bag to see if I left anything out. Witht previous CI, we would go down the MAR one by one. I didn't even pull the meds out of the bag. I believe I had a part in not noticing I did not give one med but I feel like she was also to blame and should have taken some of the responsibility. The reason she was in the room and scanning the meds with me was to make sure I gave meds in their entirety and correctly. To make matters worse, at lunch in front of thte rest of my class, she stated that I was just not with it and my head was off today. We have one more week and this week I will have two patients. I am just terrified to ask her for any direction or questions. I hope and pray I get a helpful RN and easy patients, because I don't want to have to do a skill I hven't performed before in fear of getting unsatisfactories. I just feel like she is very inconsistent. How can we know what we shouldn't do if she doesn't walk us through it.Honest opinions would really help. This has been bothering me all week and I just can't get it off my mind.