I consumed Yasmin about 2 years ago,and now face hair loss problem,is it cause by the pills,or other causes??

i consumed Yasmin about 1 year ago,and now i faced serious hair loss problem.i dont know whether it is cause by the pills or not.what should i do?how can i make my hair grow back?what are the other side effects for Yasmin pill?if it is really cause by Yasmin,why it takes so long to know the side effects?some say have to consume other birth-control pill to make the hair grow back,but i dont want to consume any birth-control pills anymore,any other method?