I hated Chemistry! made me second guess my goals too. But remember this that badge is going to say RN NOT RN made a "C" in chemistry. Great advice to get the dosage calculation book. And really when you are practicing as a RN you will have books, calculator sometimes a pharmacist and other nurses there to help with those drug calculations. Hang in there and dont get too discouraged. We all get down and second guess ourselves-even after 20 years i do it! LOL and then go to work tomorrow!