chateal birth control.

Jessica
So I am 17, I've been on chateal since January of 2016. At first I was absolutely fine. Now, I am gaining weight. Depressed, irritable, I have a ton of anxiety ... and I just am having such a hard time. 
Has any one else get this way on this. Birth control...? And when I'm on the sugar pills I barely get a period at all. It's literally two days long and doesn't even look like a period. I also bleed throughout each month no matter what... I don't know what to do. I just want to be myself again.