Need Help Getting Checked. Please Help

I am 16 and was always the impression that hospitals were confidential and that parental consent wasn't needed for most things, as long as they aren't surgical. I called my nearest hospital and asked what I needed in order to get checked, and they said your health insurance card and ID. I then said that what if I'm underage and aren't able to get those things, to which he responded that I needed parental consent in order for a doctor to get checked. Someone please help. I'm scared that I may have something and I would honestly be kicked out if it was known that I wasn't straight.