Don't drop!

You can do it! This will give you good practice for when you are in nursing school. YOu'll have to take 3 or 4 classes at once! That's what i'm worried about. I'm used to just taking 1 or 2 classes at a time!
Micro was definitely tough and I had to study every day to keep up, but you can do it. It's ok to mess up a test or two, just try and study a little bit every night and if you don't understand it, google it! This will give you motivation to study harder for the next test. Not saying you didn't study hard for the first test, but now you know how the tests are.
Good luck! You can do it! I took Organic chemistry and a computer class over the summer years ago and I got a C on my first Organic test and was thinking of dropping, but that would be me behind. So I stuck it out and ended up with an A!
You can do it