Pregnancy after marriage

Since this past November I've had 3 miscarriages. The last one required a d&c. It's been 6 weeks and I haven't had a period. I took a pregnancy test after 30 days just to see and it was negative. Something in my gut told me to check again and today it was positive. After the surgery I had little to no bleeding for a few days and then by the 3rd or 4th day it was heavy and was more what I expected after the surgery and now I'm thinking it could been a period? Has anyone else gotten pregnant RIGHT AFTER a d&c? I'm kinda nervous