Help Please

Hello I’m new to this and also first time mum..

I was wondering if someone could help me

And give me some reassurance please

My due date is 22nd March 2022

I’m 16 weeks & 2 days

Did I get pregnant to do with anything in May?

My last period was around 15th May onwards for a couple of days say up to the 20th May.

I had intercourse with someone on the 10-15th May.

Can’t remember the date

But I’ve been with the babies father since the 20th May ( we had broken up and wanted to try again)

I have irregular periods and that’s the last period I know of, so I didn’t have one in june. But obviously you can still ovulate

Many thanks