Am I okay?

I let my boyfriend cum inside me 5-6 days after my period finished. I let him finish in me while I'm on my period too (I know that's tmi and kinda gross). But other than that he pulls out or we use condoms. I take my birth control regularly. Usually 15-30 min early or late but never have missed a pill. Also I've been on it for 4 years and no issues yet. Obviously with the time change this month- I usually take my bc at midnight and I should be taking it at 11pm with the change but I still take it at midnight. Do you think I could be pregnant? Or what are my chances?