What should I do?

So I gave birth to my baby 3 months ago. At my 6 week pp check up I got on birth control, for two weeks that I was taking them I bled like a period every single day with period pains. So I stopped taking them. I’m pretty sure my pp check up was February 13th. And the day I went to my pp check up I started my period. So now it’s April 9th and I still haven’t started my period. I’ve had period pains since Sunday. But no period. And last night, before bed, I wiped and it was faint pink blood. So I figured I was about to start my period over night, so I wore a panty liner to bed. Well today, still no period but still a little pain. Could I be pregnant? Orr could the birth control just have messed me up?