If someone had unprotected sex then got their period 2-3 days later can they still be pregnant?

Usually no, but if it’s implantation spotting it could be.

Was it a normal cycle? You got your period on time?

a lot heavier than usual. on time? I dont know I usually skip them with birth control. Stopped BC though

Oh, if you’re irregular it makes it harder to know, but if it seemed like a full fledged period then it’s very unlikely you’re pregnant, but why not take a pregnancy test in a week and be sure.

Well I once had the weird feeling I was pregnant but shook it off as I had just had my period.
Well,...turns out my “feeling” was right, but it was a life threatening ectopic pregnancy.

Yes. Paint the nursery.