I can’t eat!!

I am almost 18 weeks and I am so full all of the time. Is it normal to be constantly stuffed after even only 150-200 calories?! I feel like I’m still not big enough for this! I have an appetite and really want to eat more but my stomach feels severely restricted and I’m done after the tiniest little plate. I would love to have a donut or a cookie or even some oatmeal but I can’t even imagine fitting it in when I’m stuffed even a few bites of my proteins and veggies. I also have to take thr longest time eating to ensure I don’t vomit from being too full. I can’t even drink water with meals or even 30 min after. I’m so sad you guys I just want to enjoy a meal again!