cymbalta withdrawal

i started going off cymbalta slowly from 90mg all the way down to 20mg (on my doctors orders). My migraines have been way worse throughout this process and saturday was my last dose of cymbalta. Sunday at 4ish i had a super intense migraine with nausea and diarrhea. I went to bed around 7 and then woke up from a nightmare. I was able to go back to sleep but woke up at 11. I sat at the toilet because i felt super nauseous, which normally happens after a migraine, but then got back in bed and I can't sleep and have been crying for no reason. I feel like i'm slipping back into my depression and i don't know what to do.