The right bottom of my stomach hurts when i walk or move my right leg.?

[brenda]

1 day ago, i played tennis for more than 3 hour straight. I have never worked my body that much in my life. I'm guessing it's from how much i pushed myself or either that it's a blood clot because i haven't had my period yet, and i think it's been more than a month. Can someone tell me what i have?
thankyou