I really want to quit my job!

If I quit my job. I got no money coming in. That's not good. How will I pay for my bills? This job is killing me. My hair is falling out from all the stress I have. I'm not sleeping maybe I get 3 or 4 hrs of sleep a day. That's why I have bags under my eyes. My job is not the only problem I have. I'm thinking about starting my own business. But I'm afraid it won't work. My friends tell me if I don't try how will I know? My friends tell me to go for it but my husband is so negative. Telling me what happens if it doesn't work. I told him I go look for job. He worry I ask him for money. He doesn't have to say it you could tell on his face. When you are in a marriage you are suppose to support each other. He hasn't I make my own money pay for my own bills. I never ask him for a dime. Don't know what to do? It's a dead end job. Don't want to be here forever! I'm not making any money.