When it comes to depressive episodes, how long did your longest one last?

I used to cycle more rapidly, but this depressive phase that I am in right now has been going on since September. Maybe a little bit of mixed mood in between, but mostly depression. Maybe my patterns are becoming more seasonal, but I'm really not sure. It is getting more and more difficult for me. It is exhausting that I am not responding to meds at the pace that I have been hoping for.

I cannot take antidepressants or even Wellbutrin, or it throws me into mania or a terrible mixed state with psychotic features. I experience a mild response on certain antipsychotics, especially when increased, but the side effects become problematic if the dose is too high. In the past, high dose Seroquel was somewhat helpful. I'm maxed out on Lamictal. There's definitely more medications out there that I haven't tried yet though. Right now, I am on Lamictal, Seroquel, Klonopin, and Latuda. Maybe something needs to be either increased or changed entirely.
This is getting so frustrating....I'm like, when is this going to stop? I know there's no exact answer to this. I just feel so defeated.