Like you, I can not play nor write music while I am depressed. It just takes it all out of me and I have no energy left to do much of anything. I have written poetry while depressed, but it all comes out sounding negative, so I don't even do that anymore. Maybe you could take advantage of your next manic cycle and do another big painting. That way after many manic high energy cycles, you will have tons of big paintings worth lots of money.