Old hgc after MMC or new pregnancy?

[MAS50]

Morning ladies.

I could do with some opinions please. I had a MMC over Christmas and surgical management on the 29th, 3 weeks ago. I was told to test 2 weeks later so last week I was still getting a strong positive. EPU said to test again today and if still positive they'd scan me. Well it's still positive, but (and with hindsight this was stupid) OH and I did have a slip 10 days ago and had unprotected sex. I know the chances are really slim but can't help but wonder if last weeks positive was hcg from old pregnancy and that this could be a new one. If EPU scan me would they be able to tell at this super early stage if it was a new pregnancy? The last thing I want is more meds or surgery to get rid of anything in my womb that could actually be a new pregnancy. Like I said, I know the chances of that are so low, would have to have ovulated 10 days after surgery and it's early to get a bfp at what would be the equivalent of 10DPO but it's not impossible. Not sure what to do?

At 10 DPO you don’t get a blazing positive. And I’m confused - you had sex 10 days ago but tested last week? - when was this? 5 days ago? 2?

I’m just trying to work it out because if you had sex 10 days ago but tested 5 days ago, that test would have been negative with a new pregnancy x

Yeah tested 7 days ago so that was only 3 days after the unprotected sex, so that was 100% left over hcg from old pregnancy. My concern is today's positive and if that's definitely still the old pregnancy or if it could be a new one. And main concern really is if EPU will be able to tell either way? I am fully aware it was a really stupid thing to do 🤦‍♀️ tbh I felt back to my normal self and just didn't expect the test last week to still be showing positive. This is why they say to wait until after first period to try again!

The other question is when you had sex, we’re you actually ovulating? You are you’re 10 dpo but it sounds like you’re actually just days past having sex unless you were tracking ovulation?

A blazing positive 7 days ago that hasn’t got any fainter sounds unlikely to be a new pregnancy tbh. As I say at 10dpo a pregnancy would be a fainter line, at 14 dpo+ depending on the brand, you can expect test lines as strong as the control lines. So logically I’d expect the HCG concentration to have fallen to then be getting darker again with a new pregnancy.

I’m sorry OP but it sounds to me like you have some retained products and will need further management. I’m sorry for your loss xx

@MrsSmith2021 thank you. Just needed another opinion rather than going crazy on my own! Thanks for your help. Will phone EPU now. I hope this is all over soon!xx

So to clarify:

Surgery 29/12
09/01 approx had unprotected sex
12/01 tested, BFP, assuming from previous pregnancy
19/01tested again, still BFP, now concerned is due to unprotected sex, not previous pregnancy?

I'm afraid if it was a new pregnancy, EPU wouldn't be able to see anything at this stage. What they will likely do is just scan you @MAS50 then wait and see! If the tests get darker, its likely new. If they get weaker, its likely old.

For personal perspective - I had surgery on 30/11 and it has take 6 weeks for me to ovulate and 7 weeks for my tests to become BFN. The foetus had grown to 11 weeks and my surgery was at 13 weeks, so HCG was sky high for a longggg time.

@TheDaydreamBelievers thank you and I'm sorry for your loss.

Yes your dates above are right 😊. I have an appt with EPU tomorrow for a scan so will 'fess up to our irresponsible BD and see what they say. Ideally I'll just keep testing each week and will see it either go lighter or darker. In reality I do know the chances of it being a new pregnancy are pretty much nil. I was just really expecting a BFN today. But know it can take a while, as it has done for you xx