I have no clue about Phenibut or 4-Ho-met, but I have a fair amount of experience with MDMA and other 'uppers' - after an irresponsible 'binge' on similar substances (I've learnt my lesson there) I woke up during the night; I had been dreaming of a man singing. His voice was operatic and felt as though it really penetrated my soul. I awoke to find myself crying, and I cried for a good while (for the first time in a long time). I fell asleep again shortly after and woke up feeling very positive and refreshed, sort of cleansed...
I would put my experience down to foolish abuse of stimulant drugs, which messed my enorphine levels up and left me feeling very low (even though I wasn't conciously very aware of this) - the crying I would say was my body's attempt to flush these feelings out and cleanse me - you always feel better after a good cry. Maybe yours was something similar?
However good I may have felt after this, I learnt my lesson with drugs like these, abuse can cause serious mental health problems such as anxiety and depression - and they're not great for you physically either. I'd say give your body a break, don't try and fix problems stemming from drugs with more drugs. Focus on relaxation, maybe meditation? Eat some good food too (fresh fruit and veg). It's a natural high you can't beat!
Sorry to ramble dude, just thought I'd share, it's better to avoid going down that road.
Good luck, and peace

"You can't stop the waves, but you can learn to surf"