#still confused

Nazlee

I dont know what to think of it my after waiting for my period about 49days it come but only lasted for 4 days is it normal or do i need to worry i ideally get my period for 7day or 6 maybe 5 bt neva 4 its weird how short it was im on birthcontrole 500mg metformin and brewers yeast im trying to get my cycle bck to 28days help plz