Not sure if I'm overthinking..

I found out I'm pregnant last Tuesday. My doctor thinks I could be 7 weeks but isn't sure because I was on birth control when I got pregnant. I am getting a second blood test done tomorrow to make sure my hcg levels are doubling, and then and ultrasound on Tuesday to try and see how far I am. I was feeling the "morning sickness" quite a bit for a whole but now it doesn't happen as much, now I'm most just eating a lot. I guess I'm scared something is wrong. Is it normal my sickness has gone away and I'm just eating a lot but no other symptoms really??