I got a 2 week early period. i'm on the yasmin (drospirenone and ethinyl estradiol) pill and my period is really heavy but very thin blood. what is wrong with me ? how long will this be?

Breakthrough bleed: Breakthrough bleeding (bleeding at the wrong time) is very normal on birth control. It happens in about 1/3 of users. Its no big deal and usually self corrects over time. If you are not satisfied or it continues to happen then consider using a different birth control method. It is a common side effect and does not mean something is wrong or that the pill is not working.