Dealing with failing a class

Okay so I know this is long but I have to explain. The semester ended December 6th and grades go in December 10th by 9am. This semester (fall 2018) I took biology and biology lab. In my biology class I passed every test which I was shocked by because I heard biology was very very hard. In my biology class my final grade is either a B or an A. In my biology lab class we had 4 practicals the first practical I made an 90, the second practical I made a 80. For my third and fourth practical I have absolutely no idea what I made, because my teacher doesn't like to give grades back. This entire semester from August to December she only let us know our grades twice. The first time she let me know my grade I had a 76%. The last time she let me know my grade ( before I took the last 2 practicals) I had an 82%. Since the last time she let me know my grade I've taken 2 practicals which were very hard. I don't know if I'll pass the class. Let me explain the grading scale

• lab practicals (4) = 45% (I don't know my average for all 4 practicals)
  
• post lab assignments = 30% ( my average for post labs is a 61%
  
• Participation/discussion = 10 %
  
• Wolbachia presentation= 15% of overall final grade ( my average out of 15 is 4.26 for the presentation)
  

The reason I feel I strongly failed is because I don't know my grade before the presentation and I didn't present my presentation. So I don't have a lot of points for that. My sister was my lab partner and she didn't want to present and I'm not going to say I let her influence me because I have my own mind, but she got to me a little and my nerves are really bad when it comes to presentations. I've did every presentation in every other class that she wasn't in btw. I was nervous to present in those classes but I told myself I would never let a presentation come in the way of me passing or failing a class. Im disappointed because I did just that in my lab class. I'm also disappointed because my sister is failing the lab class (badly) and she doesn't care. My lab teacher actually told me I have a lot of patience when it comes to my sister and it's time to cut the cord and move on without her because she's not going to make it in the healthcare field. My teacher also told me I am going to be a great nurse. I feel like not presenting and losing 15% of my overall final grade hurt me real bad, and also I didn't know my grade before presentations. I can't believe I didn't present it was a mistake. That's the thing about mistakes I learn from it. I will always present a presentation whether nerves get in my way or not. Now I can't sleep because I can't believe I failed because I didn't present. So basically I pass the biology class and fail the lab class. Next semester ( Spring 2018) I'm signed up for A&P 1 and A&P1 Lab and Biol 2 and Biology 2 lab. Being that I strongly feel I failed this lab class. Should I try and take it again spring semester or take another science sequence? Either physics or chemistry?