I thought the same samuri!
Anyhow, it depends on which type of hernia.
For example, a femoral hernia can be difficult to detect, even if you know where you are looking.
I'd chill out for a few days to see if it gets better.
If it doesn't, go see your GP, but stop relying on unqualified STW forum contributors, for their two penneth worth. There are stack sof things that can go wrong with the human body and it takes and expert to assess the symptoms. There's an extremely high chance you'll get the wrong end of the stick listeing to advice on here.
For medical matters, just seek professional advice.