Fasting is unlikely to injure you, but can delay the recovery from injury. Plus, it weakens your immune system, which improves after breaking. I suggest seeing a doctor, or postpone your fasting after recovery.
Sounds like you got a cramp from all that balling!!!! If you think that it’s a cramp, load up on fasting electrolytes, especially potassium.
I assume that you’re an athlete so you are in tune with your body …if it’s not a cramp, probably check in with your dr.
Hernias aren’t always palpable to an untrained hand.
Are you usually strenuously active? Is the pain local to one spot, one side, or is it generalized to your entire pelvis/lower abdominal area?
Worse with movement/activity?
If you’re still feeling it to the same degree after four days, safe to say it’s probably time to see your doc.