I had a pulled groin back in HS football days, hard to heal, but it did. 
Easy to reinjure when worked too hard or strained.

Edit to add:  You should go in to somebody.  I went to a massage therapist this summer,
and they work on a lot of athletes for muscle strains and issues.  Both HS and college
athletes.  A physcial therapist may be very useful also.
Chiropractors treat more bone related, allignment, back issues, etc.