becoming depressed while pregnant

I've become depressed while pregnant I've suffered hypermises from 6 week then a twisted pelvis. I'm seeing a mental health doctor in 2 weeks. If anyone else has or is suffering depression how does it make you feel and have you had help? I feel like I don't want my baby and that when he's here I won't be able to cope with him I feel constantly useless and worthless and that I should just constantly stay in bed and sleep I feel like such a failure