Sorry to hear things haven't got any easier @snowflake231 . That's unfortunate re the allergy.
Have you been off the antidepressants very long? It may take a while for your system to adjust, but hopefully the mania component of the mixed state will ease pretty soon.
I don't know what to suggest re the depression. I've been relying on behavioural activation when I'm up to it but it hasn't sounded like motivation has been a problem for you. Does social connection help? I think physical activity helps me regulate too.
Are you sleeping any better?
Sorry to be so concrete, I'm just going by my own experience. Another thing I've noticed is that times when I'm mentally unwell usually coincides with other stresses in my life eg work or family stuff and resolving those can help too. Nowadays I factor that into my medication. I've titrated the antipsychotic down but can take more PRN if I'm stressed and not sleeping. That approach helps that zombie feeling. It's worth talking to your psychiatrist as it probably depends on the half-life of the antipsychotic.