what should i do?

ive been an orientee for like 3 weeks now and m not happy at all at work...at first i liked it but weeks passed,,i started to hate it.....i was in tears 3 days ago and left too late on my shift 3-11...1nurse called out and so theres only 3nurses on the floor,,50 pts,,i got report from the morning nurse,and as soon as i was going to start my meds,,they told me to take 10more pts which i never had before,,it was already 8pm and i wasnt aware that those pts never got their 5pm meds,,(talking about accuchecks,insulin treatment)i know the ration is not too bad for a subacute facility but for a newbee 16pts was a lot for me,,,they left me bymyself without any endorsement from the morning nurse,,,one pt was not stable at all and was in respiratory distress,,good thing one nurse helped out....one nurse there told me to help me with my meds which she told me she did,,,and she wanted me just to sign the MAR,,,im like how am i supposed to do that? i didnt even know if she gave the meds for real???they even gave me 2 g tubes pts which i never did before...arrrgghhh,,i just wanna passed out tht night....i dont know how i did it,,,the 11-7 nurse was kinda upset bec i didnt reaally gave her a good endorsement,,,today ,i talked to my don,,and i just want to quit,,she didnt even ask me what happened...instead she wanted me to stay and give it a try in long term unit,,,coz i told her subacute is too crazy for me,,,i dunno ,,im confused ,,,,ilove the job ,,but my cowokers wasnt reaaly helpful and i didnt get the proper training...tomorrow the other place wants to hire me ,,its a long term faciity,and they want to do the paper work already,,should i stay or not? i unno,,im stressing already,,,sorry its too long,,,,,