BFP right after Miscarriage?

I experienced a MC in July (D & C July 17th). I was at 12 weeks when I found out, but baby stopped developing at 9 wks and 2 dys. We have been pretty devastated. 😭

Has anyone gotten their rainbow baby this quickly after a mc (specifically someone who may have had a D&C;)? Did you test HCG between the hospital and your first cycle?

In case anyone is in the same boat, here are my symptoms and progression over the past few weeks:

-MC: 17 Jul.

-Spotting/Bleeding/Period: 17-20th.

-No symptoms: 20-22nd, worked out a lot.

-Spotting: 23-24th Jul, worked out a lot.

-No symptoms: 25-29th, worked out a lot.

-Negative OPKs: 30-31st, worked out a lot, good sex drive, some EWCF. We feel comfortable with sex again.

-Positive OPKs: 1-4th Aug, lots of EWCF, good sex drive, worked out every other

-Continued to have good energy and feeling focused on work, taking care of the house. Not concerned with TTC or too down from the loss. Feeling in-between and staying busy.

-BFP: 14 Aug, 9 DPO, test light in color (unsure if it's leftover HCG), sneezing a bit, energy bursts (1st Response brand).

-BFP: 18 Aug, 13 DPO, sneezing a bit still but don't feel sick and dont have allergies, high energy continues, used different test (Rite Aid store brand) and still light in color on test. Period overdue (supposed to start 17 Aug) but no sign of spotting or AF. Some cramping/twinges in pelvic area but on both sides.

BFP: 19 Aug on Clearblue digital.

-BFP: 21 Aug, tested on store brand from Rite Aid and definitely getting way darker!!!

I never tested for pregnancy or HCG after my D&C.; The only thing I knew leaving the hospital is the doc said HCG was very low but didn't share the exact number with me. I spent a lot of days following my mc doing moderate exercise and getting back to good health mentally/physically.

When I got pregnant with my baby boy (he's 10 months and very healthy pregnancy) and then this second pregnancy that ended in miscarriage, my first symptoms both times were sneezing unaccompanied by any cold or sickness and bursts of energy. So that goes along with my normal pregnant symptoms.

I want to be excited but since I never tested for pregnancy between then and now, I don't want to get my hopes up and it just be leftover HCG in my system from the prior pregnancy so I've been waiting a few days in between tests to see if the line is getting darker. Sure enough if finally did on the 21st and today's test looks pretty similar. Fingers crossed!

I have a doctor appt on 1 Sep, but it's the earliest I can get in for my follow-up so I thought I'd chime in to hear other stories or see what others have experienced. We hope it's a BFP because we have been really looking forward to our little ones being close in age and our 10-month-old little man needs a buddy!!! :)