I have been on birth control since 8th grade to regulate. I ve never had a problem with it till now. I skipped the sugar pills in march because i was going on vacation and was tryin to not have my period then, but it ended up coming anyways. I then took the sugar pills in april and i was just fine, it came when it was suppose to. Well now in May, i skipped the sugar pills again and it then started on saturday may 19 and i was suppose to start on may 16. and i usually only have it about 4 days, well i m still having it and it is now may 30.