I have a gained alot of weight the past 2 years, aprox 80 lbs, and it has all gone to my belly. I have what seems like hard bump or mass/muscle above my belly button, about 2 inches wide, and 1 inch in height, no pain even when i push on it, just feels stiff like a hard muscle. Is this just my stomach pushing on a muscle or is this something i should worry about and have looked at?