Hey Piano,
First, welcome!! You will find a lot of good, helpful, caring people here that can help. I'm sorry you have to deal with depresion on top of other medical problems already. I have to agree with the others, you need to talk to a dr about
this. I don't know if or how it might apply but there is something called seasonal affective disorder. Also known as winter depression. It doesn't always apply to winter though. You may want to look into that and talk to someone about
it. Also try to understand that depression is caused by a chemical imbalance in the brain. It doesn't have to have a reason. Like Victoria said, you could have everything a person needs to have a great life and be a happy person and still suffer depression. It's an illness not a choice. Take care of yourself and keep posting here. If you do, you will find helpful caring advice.
BrodyDog