Is it the baby or am I legit getting fat

Can't do a pic right now but I'm 10 weeks 2 days with my first pregnancy ever, so I don't have a baby bump. But I started with a flat hard tummy and I CANNOT suck in this pooch I have now. I am still thin in the morning but once I eat it's like HELLO

Is this new fat caused by my metabolism slowing down, or is this possibly my uterus pushing up my intestines slightly? Need to know if I need a food intervention here *hides box of lucky charms behind back* or if this is just my uterus