I Play Quite A Bit Of Competitive Softball, Back In

I play quite a bit of competitive softball, back in July i was playing and the field was a synthetic dirt which is slick. I was running the bases and felt like i tweaked my groin/hip flexor, it has progressively gotten worse, the season is now over and it seems like its getting better. My questions are:

How high up would i feel a groin injury?
Could it be a sports hernia? I have not had the "bulge" that is normally thopught to be tied to a hernia.
i really only feel the pain from it when i am attempting to sprint or make quick side to side movements.
thanks in advance, Jeff