First, I'd tell you to take that summer before college off to enjoy yourself. You'll be glad you did.
Next, you have to decide what major you want to be in. You don't really need to be a bio major in particular to do any health related field, you just have to complete the pre-requisites. If you like science anyway, it might just fit to do a science major. Most important, however, is to spend some time during your first and second years of college volunteering at an optometrist's office, discovering if that's what you really want to do. Same with pharmacy/dentistry/anything health related. Countless people come in wanting to do "pre-med" for two quarters and then switch to econ because it's just not what they really wanted to do after all. Find out what you really want to do by actually DOING these things first. As I've discovered, theres more to the decision than liking a particular subject, enjoying pill counting, saying "1 or 2", or studying physiology.
Essentially, you just gotta try different things out. Attend club meetings or speak to your optometrist to gain a little perspective.
If you were to ask us, most of us will say, "do optometry" and give you a list of good reasons. That's expected, of course, because most of us want to/are doing optometry. You'll find out in due time whether or not you want to pursue optometry. Don't freak out just yet about THE REST OF YOUR LIFE because everyone else has been in that same state of mind, some maybe twice 😉 . Find out what you really want to do, devote a sincere effort to it, and all will fall into place.