You just wrote a lot of symptoms. Frequent sadness, sleep alot, hopelessness, wanting to be dead. I'm sure there are alot more symptoms that you have that you haven't thought of yet.
You do need to talk to your doctor -- he can refer you to a good therapist. Therapy does work!! If you can't afford therapy or if you don't have insurance that covers it, your doctor can still help you.
I've been thru therapy, and I've also been treated for depression for 40 years! I've been doing quite well, with just a few bumps in the road. So please call your doctor!! Believe me, you won't regret it.

God bless and please let us know what happens, okay? Hugs, Lee