I'm Not Sure I Have A Hernia...but I Tried To

I'm not sure I have a hernia...but I tried to get up from a recliner and had what I can only call "a Charlie horse in my stomach" . The pain was like a knife above my belly button and below my rib cage.. It took a considerable amount of time to subside..(1-2 hours). I then put on a Back belt, (which I had for a Crushed L2 vertebrae from years before.) I have been wearing the brace for about two weeks. The pain is gone. but I still can't seem to lift anything over the weight of two gallons of water for my fish tanks. If I lift any thing heavy I can feel a small pull in the upper abdominal muscles.