How To Heal From Injury In Muscles?

Recently while returning back to playing squash (after having a baby and gaining lots of weight) i pulled by groin mussel and assessed it as a grade 2 (from web information) now a few days later bruising and sever pain has formed on the bottom half of the adductor mussel (i think-its down close to my knee on my inside leg) and the pain and bruising is appearing in a straight line going down nearly to my ankle! Ive tried unsuccessful to make a diagnosis from the web information. As this isnt the original place the goin pain started from!