So long story short I had a missed miscarriage in May. I was scheduled for a d & c but started passing the tissue naturally the morning of. Due to passing naturally we canceled the D & C. My hcg was dropping very slowly so in June they scheduled a followup ultrasound. They ended up finding a small mass which lead to more tests (mri & hysteroscopy). The hysteroscopy revealed the small mass as well as some tissue leftover from the miscarriage. I had what I considered a period on July 4-9. I had a hysteroscopy and D&C on July 13. All went well and my hcg finally went back to 0.

I took a pregnancy test on Sunday (8/2) and it was negative. I took two pregnancy tests today and they were both positive! My question is what date should I go by as my last period (July 4 or July 13)?