Sex on birth control

Teyana

Hello! So let me start off saying I started Hailey fe on April 20th and had unprotected sex on May 7th. I take it every single day so I know the chance of pregnancy is low but I’m currently 2 days late on my period. I had bleeding last week that looked like spotting, varied from pink to red to brown. It wasn’t enough for a tampon but when I wiped, it was a good amount and looked like menstrual blood. Do you think it’s pregnancy?