I think I know what you mean.

I'm not sure what you consider 'high' but I have periods of days where I am completely elated for no reason, even when it's not appropriate. I also have periods of feeling 'high', as if I'd smoked. And people often mistake me for having smoked.

But then sometimes I'm the other end of the scale...lethargic, depressed...

I'm so sorry to hear how difficult things are for you...I knwo the feeling well of life spiraling out of control. I'm here if you need me.