extreme bloating

I'm 6 weeks pregnant and I can't tell if I'm just really really bloated or if I've gained a lot of weight in my lower belly area. I feel like I can't "suck it in" anymore and I'm hoping it's just because of the baby but idk. I probably sound really stupid but I've struggled my whole life with eating disorders and I'm terrified of gaining weight and this is making me really depressed. pregnancy or just fat :(