My groin hurts bad- help please?

Your appendix is on your lower right side of your lower abdomen and if it hurts it'll be so bad you'll have to see a doctor asap but there is nothing right above your balls except your penis and pelvic bone at the base of your penis. If you were jacking off for 3 hours you might have put too much of a strain on yourself. See what it feels like tomorrow and then decide if you need a doctor.