I am on the pill (and have been for 3 years due to PCOS) and take it religiously every day at the same time (9:30pm)

I do have sex with my boyfriend unprotected and he did cum inside me once this month.

I normally do get my ‘period’/breakthrough bleed every month at the same time but not this month...

I am currently doing exam revision for my exams next week so i don’t know if that is causing it ?

Am I pregnant??

Should I take a pregnancy test?

Please help me ?