I don't know if im bloated or fat?

Hello, I have quite a bloated belly. The rest of my body is very skinny. I have to hold it in otherwise it feels like its being pulled away from me and feels like its stretching. I also started farting a lot since my belly started showing. I look about 3-4 month pregnant (although I'm a bloke). So how do I know if im just eating too much or if im actually bloated??