BIRTH CONTROL OR PREGNANT?

Okay so i was on birth control pills for a while.. (4-5 months is a good guess) so i stopped taking them the week after my period in November then about the 28th i stopped taking it because it constantly made me sick . THAT NEXT WEEK my period was back on ! As you guys can see my period was scheduled to come on the January 5th and it hasn’t.. I have had sex but it was protected the first time and the second we used the pull out method.. (the sex occurred the week of the 24th) Now I’m 4 days late now and every since the 5th I’ve been having light cramps and lower back aches.. i haven’t had any colored discharge until today when i wiped and it was kinda pinkish.. like idk if my period has skipped or what or if it’s a pregnancy scare.. any advice ? Do y’all think i could be pregnant or is this just my body getting used to me not taking my birth control ?