When I tried keto I got depressed-tips on this side effect?

I tried keto recently, got a week into it, and found my depression (I have bipolar) was much worse. I read up a little and found that this can be a side effect of keto. Does anyone have experience with this side effect? Is it just part of the keto flu that goes away in a few days, or can keto accidentally affect people with depression to the point where they would not be able to do it?