A single dropped class (or two) early in your college career won't even be noticed if the rest of your transcript is worthy.
Making a habit of dropping classes will not look good. However, most applicants have at least one dropped class. A few have many.
Your performance (assuming you have been working, not goofing off) up till now in the class is the best evidence for predicting what your performance will be like in the rest of the class. If you have been working hard and are getting a D/F, then it is unreasonable for you to believe that getting a good grade is likely. Mathmatically possible, metaphysically possible, but nomologically quite unlikely.
Also, why the hell would anyone take cal2? Calculus is hell, and it isn't even real math. Yuck. You don't even need calculus 2 for med school. You certainly won't use it while in med school. The only math you will use is arithmetic, some stats, logs & exponents. Thats all.
Maybe you are one of those engineering sickos. Hmmmm...
Good luck, kiddo....