So sorry you are feeling depressed but I do think it's pretty normal. I had a bilateral mastectomy in March 2012 and I was depressed for a while as well.
This site helped me get through the worst of it. I hope we are all able to help you. You may need to reach out to a support group, see a counselor/therapist, or perhaps call a place like Imerman's Angels. They can find a mentor for you. We are all very different. What works for one may not work for another.
I pray you do better each day. Please keep us posted on your progress.