22 weeks and bad depression.

This is my 4th. My other pregnancies never made me feel this way. I am always bad depressed some days are worse than others. I know i wont actually harm myself but it does get to the point that i want to die. Its not that i am having a baby or that i am pregnant. I am just depressed about everything else. I have no one and everyone thinks oh you will be fine or im stupid. My husband makes things sooo much worse for me. He is not supportive all he does it put me more down. And then i feel worse because i feel like this while i am pregnant with my miracle rainbow baby. I dont know what to do any more.