I'm sorry you're so miserable!! What has helped me in mixed states is increasing Seroquel. I know it's considered an AP, but I think in a way it's a 'mood stabilizer' in the sense that -3 pdocs have told me- it helps with both depression and mania -(whereas, for example, I think Latuda just helps with depression, and Lithium, my pdoc tells me, is mostly good at staving off mania). So if your pdoc is reluctant to prescribe a mood stabilizer, maybe s/he could up the Seroquel?

Best of luck, I know you've been through the ringer and back lately and I hope you feel better soon!