Skinny w/ no excess fat on stomach. sometimes flat in morning but mostly very bloated & sticks out far all day. so bad that i look pregnant. why?

Gastrointestinal: The fact that ur stomach sticks out despite u being skinny could just b due to poor mucsle tone in ur abdominal muscles which can b corrected with exercise.However,the bloating sounds like u have a gastrointestinal problem such as IBS, lactose intolerance, or gluten sensitivity (or even celikac disease).Try avoiding lactose.If that doesn't help,try avoiding gluten. If still having trouble c ur PCP