What type of eating disorder do I have?

I always eat when I'm stressed or sad, to the point where I'm too full and uncomfortably bloated. I can't stop eating lately because I have so much going on right now. I've gained over 35lbs in just a few months. However, over-eating isn't the only thing I've struggled with. In the past, I've also starved myself for days at a time when I feel guilty about eating so much food. I've been underweight before, I've been healthy weight before, but now I'm overweight.