HELP PLEASE

I started taking lo loestrin fe on may 7- this was the last day of my period and I took two pills that day as recommended by my gyno. I took the pill regularly but was like 1.5hrs late on my 5th pill.. I had unprotected sex on the 13th ( I had already taken 7 pills by the time I had sex) .. first day of my fertile window. He pulled out but we did it twice so there was probably still some residue. I took a plan b like 45 minutes after. I started getting brown discharge on and off on the 17th and I’m still getting it a little bit today (23rd). I heard plan b wasn’t effective near ovulation- were the birth control pills working yet then?? Please please help I’m very scared.. is this bleeding from the pills or implantation/ovulation spotting???? Do you think I’m pregnant??