I was diagnosed with a inguinal hernia last year, with the possibility of both left and right tears.
I finally got to see a specialist who sent me for a scan. The scan failed to pick up the hernia's so the specialist said the pain was more than likely a muscle strain with inflamation (?).
At the same time that I saw the specialist, I also developed an umbilical hernia. No doubting this one, it's clearly visible but the specialist won't operate on it because it's not large enough to bother with, according to him.
My doc says the only way to fix hernia's is an operation, they do not get better over time, only stable or worse. The operation is usually just day surgery with local pain sedatives and recovery is quite fast with a return to full training abilities within 6 to 8 weeks. Moderate training in 4 weeks plus.
Lots of info on the net but a referral to a specialist is the best thing.