Medical School is hard. You will not be playing any sport in competitive manner. You can still play for fun and stay in shape. You are going to be a sophmore. This means you most likely have not taken the physics, math, or organic chemistry and biology courses. Even if you wanted to go to medical school, you would still have to do well in those courses. In fact after taking a couple of those you may change you mind completely. Do some research and volunteer work in the ER. Talk to the residents. They will have a little bid of a jaded perspective since they are working 80hrs a week but when you do residency you will have to do the same.
You did not mention if you like medicine or not. Why are you considering medicine. You will get that question in almost every interview for medical school. Oh, I forgot the MCAT. you will need to prepare for that exam and take it before even applying to medical school.
So lets see,
2 years of science courses
volunteer work
MCAT
4 years of Medical school
3 to 7 years of residency
Practice medicine.
Is it worth it? It's up to you, I just thought you should know all the facts. Worth has an emotional component to it. No one can answer that question for you. However, in order for you to make your choice you have to have all the facts and do some soul searching. Only then can you make an accurate choice with as close to 100% accuracy as possible.
Good luck.
PS, if you did take all those science courses, you could apply it to other majors like pharmacy, nursing, PA school, medical/pharmaceutical sales, dental school, physical therapy, etc.