August 20th due date 👶//symptoms???

So I haven't had my first appointment yet until the 3rd..it's such a long wait!!!! Well anyway, my estimate is Aug 20th. I'm at my 6 week mark and I'm feeling EXTRA hungry. I eat and get full fast and then am hour later my stomach starts to growl :( I'm so scared to gain so much weight!!! I also haven't had any morning sickness, is that normal? Sometimes I feel like throwing up after I eat but I never have. So far I felt that in like 4 days. I also get hot flashes and I'm very emotional!I cry a lot lol

I'm a first time mom so I would like advice on what to expect this week and upcoming weeks :)

Congrats to all the mommy's to be💖👶