Whats wrong with me ?

hi what it is my belly started to feel hard above my belly on and now its started to get bigger. am on the bigger size so i feel it under the top layer of my stomach. when i eat and get full sometimes i cant keep it done and sometimes i get cramps in my lower stomach and a sore back. the hard feeling am getting dose not feel like a ball or nothing just like its taking over my hole belly lol. i sometimes feel twinge at different parts of my belly like below my ribs and then by the bottom of my stomach. my belly's not sore to the touch or anything just get aches every now and then. if anyone has felt like this or no of something that it sounds i would like to no what you think i would appreciate it. its been like this for about 3 months now and i am going the docs its just my mate have said its nothing so i have been putting it of but going now this week thanks x