in need of some reassurance

i miscarried last year at this time at 4 weeks and 4 days. they told me it was chromosomal issues as i implanted the day before my period started.

i am currently 6 weeks and 4 days with my rainbow. can’t see my doctor till the 17th and all i keep thinking is that i’ll end up with a blighted ovum.

last year was my first miscarriage. i have a son who’s 4. i’m only 23 and that miscarriage completely ripped through my anxiety and now all i feel is anxious.

everytime i cramp my mind automatically goes into ectopic pregnancy and if it isn’t that then all i think is blighted ovum.

what are my chances of that actually being a possibility ?