Nervous and stressing!

I had two miscarriages, one one Nov of 2019 and the other Feb 2020. Both of the miscarriages were around 6 weeks and required a D&C. I had no symptoms of miscarriage until the ultrasound should no growth. I had complications with the D&C in Feb and required a second surgery and a week at the hospital. Since I had the complications my doctor recommended waiting three months to try again. I found out that I’m pregnant again earlier this week with an EDD of Feb 20 using when I ovulated (I took test). My doctor won’t see me or do any testing until I’m about 7-8 weeks. I’m so nervous that I’m going to miscarry again. I’m trying not to stress about it but it’s hard not to. Any advice?