Don't be overwhelmed. Your English looks fine and since you have a four year degree your math should be fine. Nursing math is not that difficult. Everything is a calculation or a conversion, so it's not bad. Once you memorize the different formulas and the conversions, it's a piece of cake. Don't stress over it. Your program will have a medicine/dosage calculation course. If you really feel you need to, you can go an Amazon and get a cheap dosage calculation book. As far as the rest of you schooling goes, I would focus on your upcoming A&P courses and Micro. These will be your foundation for nursing school and the rest of your career. If you have a firm grasp on these courses, it will be easier for you to understand how different disease processes and injuries affect the body and why the body responds the way it does. Hope this helps and good luck future nurse!!!!