Today I worked my butt off at work and half way through my shift the top of my stomach felt tight and very very painful, as if I had done a bunch of crunches and as though my stomach muscles have been stretched .. The pain has been there for the past 5 hours. Every now and then it'll hurt more than usual... I guess all I'm asking is what am I feeling? Are these contractions or just my body being tired? I'm a first time Mhm and im worried.