Hi i was on antibiotic for throat infection and misses a day of bc then is had an early period then decided to stop taking bc to conceive but had my period again two weeks later on august 26th til sept 3, then now again on sept 7th. Is this normal ? Had been on bc for 1 1/2 yrs. Really bar cramps, tiredness and backpain these passed 2 periods! Help! Please help! Thank you in advance. God bless