Ummmmmm

So I had sex 3 weeks ago and I'm on the pill and we didn't use protection at all. He had a vasectomy thingy done because he didn't want kids and well yeah.

But like I said I am on the pill and I start my period on Saturdays that'd just how it's been since starting the pill 3 months ago. Is there a chance that the pill didn't work? Because here it is Saturday and nothing. No cramps or anything.

I had a baby 7 almost 8 months ago so I really don't want another baby until my daughter is 2 or 3.