Reassurance

My husband and I haven’t told anyone yet so I’m reaching out for comfort. I’m 8w5d and I feel fine! I’m a little more fatigued and my breasts are tender some days but that’s it. I had a miscarriage a year ago and I’m so terrified of it happening again. We’ve been to the dr once. He did an ultrasound and we saw the baby and heard a heartbeat! (2 weeks ago) I have no reason to think anything is wrong but I can’t help it. Has anyone else gone through pregnancy with no sickness or nausea? I feel crazy for wanting to be sick. Sorry for the long post.