Pregnant after miscarriage.

I had a miscarriage last year at 4 weeks and some days and now I’m pregnant again. I’m 8 weeks 4 days and worry constantly about EVERYTHING. I had an ultrasound at 6w6d and everything looked great and a great measured heartbeat at 117. Every day since my ultrasound I have been so deathly ill puking, cannot eat or drink and the only thing I was able to do was lay in bed and puke. Now today I feel amazing. Can eat whatever I want, drink gallons and I feel great. Obviously this makes me worry thinking the worst like my hormones are going down and another miscarriage but I have zero signs and feel completely normal. At the same time I’ve read about people saying to enjoy the days you feel good but it’s so hard when you’re constantly worried 😩