I changed birth controls about 8 months ago from cyclen which I had been on for 5 years until it wasn t working anymore, since then i switched to tricyclen and Haven t had a regular period even once in just the past two birth control packs I ve had my period from Feb 26- March 13 then March 21- present With Cramps bloating everything I would have during a normal period Usually lasts two weeks at a time while I m taking birth control.