I may have a slight tear in my hamstring. Where might I go to get it checked?

It’s been a month since I pulled it, tweaked it, or whatever I did (playing Ultimate frisbee). I’ve mostly rested it, although I have played Ultimate a few times and didn’t really reinjure it. I would have expected the pain to be gone by now, but it’s still there at certain times, especially when I stretch it. I can’t run without pain.

I haven’t been to the doctor in many years and don’t really know where to go. A clinic? Get recommendations from friends? And if I were to go some place, what would happen? Would they take X-rays? And the big question: how much roughly might that cost? I have catastrophic health insurance, so I assume that wouldn’t cover it. Thanks for sharing your experience!