Freaking out, a lot.

I was standing in my kitchen earlier and I was feeling my lower belly to see if there were any changes to the hardness of it... well in the process I noticed what kind of felt like a knot and it was super sore to put pressure on. I laid down and tried to feel it again and I couldn’t find what I thought was a knot.

Anyone have any advice? Doesn’t hurt any other time other then when I pushed on it