Hard Stomach

So this might sound weird but when I’m laying down, I pushed on my stomach and there was a harder spot, it wouldn’t squish down and then I kept my hand there and I could feel it move from the right to the left? And the went up? Like I could push it around?

Is this normal??

I don’t think I’m pregnant, I’m on the pill and I just had my period and got off it 4 days ago