I have had an out-of-sequence menstrual period. My regular period was from 8th - 15th October 2014. On the 19th of October - I got another period that was quite heavy and last through to 26th of October. Las night, 30th October, I've got another period!!! My periods are usually like clock-work, very regular and predictable... so this is a bit ridiculous... and I'm a little worried! How long do the side effects usually last for? Should I expect to have a period for 25 out of 30 days in a month for a few months... or?