Coach forcing me to run with sprained hamstring?

I'm pretty sure I sprained my hamstring a couple of days ago. It's not that bad, but I feel sharp pains when I sprint on my left hamstring. My team has a meet tomorrow, and I'm not allowed to skip unless I have a professional check it out. How much does a consultation cost and who would I go see? I don't think I want to make my parents pay that much money, so is there any way I can heal it so that I can sprint tomorrow? I don't want to look like a fool.