What to do??!!

I'm 6w5d and for the past week I've been feeling really sick and my mouth taste really bitter. I have no appetite and im not hungry at all. The thought of food makes me so freaking nauseous. I eat like once a day and after eating I get really bad cramps and have to poop afterwards (sorry tmi) so it's basically like I haven't eaten all day. I try to drink water and eat crackers at night. But does anyone know what else I can do? I want to make sure my little one is getting enough nutrients but it's really hard. Ugh😓