Stomach pain when press on lower abdominal area, feel hard mass. should i be worried?

If worrying would: Help, i would tell you yes. But it doesn't. You do have something to say about all this, and you could make give your two cents by getting the best care you can get as soon as possible. It will affect outcome. There are benign conditions that lead to hard masses so worrying about it, is not ever going to help. Doing something about it, will.