Help me

I have had sore boobs for two weeks it hurts to even wear a bra I have had cramping for about a week in my pelvic area horrible headaches I got my period 3 weeks early lasted 5 days very light here's the thing I haven't had a period in months and I took 3 bc pills you think my period would have been so much heavier but nope super light!! What do you think?! Next period not due until Dec 17