PLEASE HELP ME I UNDERSTAND 😔 Need reassurance!

[Gmum1]

I split with my boyfriend sep 2019 I stayed single and sex free until I had sex with #guy1 Jan 11th (cycle day 18)2020. I got checked and was all in the clear and that was the first and last time I slept with him. Me and my boyfriend got back together, we had sex Jan 29th, 4th feb and 18 feb 2020. But who’s more likely to be the dad? Due date 28/10/2020 I had remember a bleed 22nd January For 5 days.This date was the date given to start a period and came bang on time(was this my period) I never questioned it at the time.But is this baby my boyfriend’s? I’m going crazy as to my knowledge I had no doubt untill My bf mom asked for a dna test as she knows we split up! Am I just been paranoid 😟 please help.Is there any Chance it’s guy 1s from dates can I rule him out? My bf font no btw...
28 regular cycle bleed for 5 days
11th jan 2020 :guy1
29 jan 20, 4th feb 18 feb 20 :Boyfriend
I no it was a silly but I’m learning from it 😒 any help will be appreciated xx

Did you use protection with either?

Your due date is week 40. Counting backwards to week 4 - your period due day - take away the date of likely conception - 2 weeks =your bf being the df imo.

Using a reverse calendar for due date gave me this..

If I understand correctly, you had sex on CD18 with the other guy, then 11 days later you bled, indicating a 28 day cycle. You then had sex multiple times but only with your boyfriend. I'm pretty certain your boyfriend is the dad, I can't see a way in which it's likely the other guy is due to the space between, congratulations!

With your due date you'd have conceived in early February so it's pretty self explanatory? Just use a due date calculator to tell you when you ovulated and the dad will be whoever you had sex with around that time - aka your boyfriend.

You asked about this a few days ago too - www.mumsnet.com/Talk/conception/3982706-Who-s-more-likely-Begging-for-a-lil-help

I do believe you should probably have a DNA test if you're still feeling really anxious. You could say 'This is to prove to your mum that the baby is yours'. At least then you'll know for sure without having to disclose that there was another guy?

I used this reverse due date calendar to see when I conceived my last pregnancy. They got it wrong.

Me and partner were in a long distance relationship and only saw each other once that month I conceived. The calculator got the date totally wrong.

@Neon7 did you take into account that conception and date of DTD isn't the same thing?

Juno231 - yes I did, unless you can conceive before dtd the calculation was wrong

@Neon7 I think what @Juno231 means is, for example, if you DTD on 14th of the month, baby implants about 5-14 days later but the date of "conception" or whatever they say would be 1st of the month (first day of LMP)

What was the calculator saying?