Please reassure me (I know it's ridiculous)

[Canttellmenothing]

DP and I split up for 3 months last year and I slept with another person in this time. We then got back together and I conceived about 5 weeks after we got back together.

I didn't tell him about this other person, as it was a one night stand, I was single, I had a clear STI check and it wouldn't have helped anything or anyone.

Anyway, even though I am FULLY aware that it is biologically impossible for it to be the one night stands baby (the dates are way out), I have developed this totally irrational fear that when the baby is born it is going to be obviously this other personal (they were a different race so would be physically noticeable). I have even had dreams about it and have become so fixated that the physically impossible is going to happen and this baby isn't ny partners.

Again I can't stress enough that it is my partners - if it were other man's I would have had baby by now!

Please just tell me (and don't judge me for sounding like a total fool), that it is biologically impossible for a baby to be born at 47 weeks gestation, there's no way they can scan wrong and be 7 weeks out is there?

Just for the record, I DO know these things, but my anxiety is planting all sorts of insanity in my brain.

Well, of course it's not the other man's.

If I wanted to play armchair shrink though, I'd say this fear is because you are afraid of exposure, of him finding out.

Is it an option to tell him?

Ellis thanks for replying - I know how bizarre it all sounds. Im sure the anxiety has stemmed from guilt totally!
I don't honestly see any good coming from me telling him - it's not like we were together so it's not as if he needs to know, it would only devastate him, we're weeks away from having our baby and doing better than ever, and I worry that although the dates wouldn't match up, he might think I'm saying it to cover my back incase it was the other man's.

Don't tell him now. After 9 months of not telling him you couldn't pick a worse time.
It's clearly guilt but also hormones, it's well known that pregnancy gives you really vivid dreams.
You've not long to go now, try to relax.

Very true about the vivid dreams!
I also wouldn't tell him, given what you've said.
But I wonder if it would help your anxiety not to focus on telling yourself it can't be true (cos you already know that!) and focus instead of telling yourself that you've done nothing wrong. Try to let go of the unnecessary guilt x

Don't tell him now but resolve you will tell him in maybe a year or so after the baby is born - this might help deal with your guilt

Of course it's not his. You had a period in between sleeping with each one of them right?!

Thanks for the replies ♥ I actually slept better last night than I have in weeks and I'm sure it was just because I got it off my chest on here so thank you!
Yes I had a period in between. There was 7 weeks between them so I know it's not possible, but the power of the mind is quite a scary thing!