Rant/ advice bad depression 6w 1d #2

I suffer from bad depression and have a positive pregnacey test will be baby number two but I don't belive it and my depression is getting the better of me and I don't feel like it's real I'm so convinced it's a dream where my bf is excited about n booked a privert scan I can't help but think it's not real and he keeps asking if I want the baby n don't seem to understand that it's not clicking in