Hi LiliBean, I think that when you go up to 10mg, tomorrow, that you will feel better and your mood will improve, 5mg is not much.
I went up from 7.5 to 10mg 4 days ago, huge difference, still a bit of anxiety but sleeping better and feeling more normal and hopeful than never.
Keep the faith, it does get better inside and out, you'll see. Keep us informed of the way it goes, you could have a nice surprise. Chemical imbalance for me also,not postpartum, but ,hey, a depression is a depression.
Good days to come, keep posting,