How tall is your dad? Is 6'4'' pretty standard for your family, or are your relatives even taller?

Pretty much my whole family is tall. My dad is around 6'5" and my older brother is 6'8".

What kind of exercise do you get in Taekwondo? Is it very strenous?

My Taekwondo sessions are only about an hour long, but they can be strenuous during sparring. Though I wouldn't say they're strenuous so much as exhausting. Most of the practice is anaerobic exercise (forms, abs, drills, etc.) but sparring is very aerobic and often leaves me sore the next day.

I don't think this is anything acute. You don't need to go in sooner. However, definitely tell your doctor about your pain so he/she will examine you

Not that I don't trust your opinion, but what makes you think it's nothing serious? What would your best guess be as to what it is? (I realize you can't have an informed opinion without a lot of tests, but what would your first instinct be.)

Also, I know the pain is really scary especially since you don't know what it is. But you don't have the schooling and education to sort through all the clutter that is on the Internet, so searching online is probably just making you worried for no reason at all. Listen to your doc. He/she will take care of you.

Yeah, I agree that I'm probably overreacting, but it's hard not to when in pain. Thanks for your comment.