I've been really worried for a couple of weeks that my stomach is unusually hard, to the point that I've convinced myself I have stomach cancer. I keep pressing on it to make sure - basically I feel some rigidity in the centre of my stomach, about where my ribcage ends, and I don't know if it's just muscle and if it was always like that. The bottom of my stomach sometimes feel the same which makes me think it's probably muscle, but then again it always seems to feel different and harder than I would expect muscle to feel. It doesn't hurt but I am worried. Can anyone help?