Generally, US school look at the total science GPA. So these classes will count even if they are not part of pre-req's for medical school. General rule of thumb and my opinion - "Don't mess around and screw up in any class in college! If you are interested in going to medical school - you have to hit the ground running and working hard to earn your A's!"
Since these are remedial classes - Your grades needed to be a good solid "A" - reason you build on a good solid knowledge base in college. If you want to party and play - drop out and then come back to school when you are ready to work. Don't waste your time and money in school goofing up - you can't recover your money or your time. For your next classes work hard and earn A's. You have 3.5 years to earn better grades. Best wishes!