where can i find help paying for dental work?

I am a 39 year old female. I am unemployed and having a very difficult time finding a job and I feel that it is because my teeth are in such bad shape. I have no back teeth at all and im missing 1 in the front and am on the verge of losing more. I have become very depressed and have no confidence i dont smile and i try to talk as little as possible. I feel like an embarrassment to my family and a failure due to not being able to get a job. Please help me.