Do you have test anxiety by chance?? I know I do and that got me into trouble my first term until I got it under control. I would over analzye EVERYTHING or I would be so nervous that I would literally ignore a very important word in the question that would just through me completely off.
I know it's hard, I've struggled myself. Does your program have one person that can spend time with you and help you with test taking ideas? For me I need to read each question at least twice, circle the important points and prioritize. I now wear earplugs and sit in the back for each exam. I'm almost the last one finished each exam but it's helped A LOT.
Hang in there, you'll get through it. It's a totally different world I know.