When i first went on yasmin i had my period for a month!!!!!! I'm...

When i first went on yasmin i had my period for a month!!!!!! I'm not talking a little bit of spotting i'm talking constant heavy flow for a month....It was not fun......I didn't realise it was the pill at the time, but i spoke to my cousin and she said she had the same thing.....It's made me feel tired and depressed, and i have absolutely no sex drive.....My poor boyfriend....he's so supportive....but every relationship needs intimacy........ I have gained over 5kilos since takig this which has made me quite miserable......I was already on the side of chubby now i am just plain overweight......i'm sick of these pharmaceutical companies with these new drugs promising this and that......... the problem is without the pill i have heavy periods to the point of severe blood loss anaemia, so i guess ill have to weigh up the pros and cons.....hope everyone else out there is managing ok