3-4 weeks ago I stopped taking my 20mg a day dose of Fluoxetine HCL (Generic Prozac) and have been feeling a lot more productive without it. I had no noticeable symptoms from stopping. About a week ago I went from smoking two or three bong rips a day (for the last 6 months), to completely cold turkey and having been feeling some extremely negative side effects. I can fall asleep fine, but I wake up multiple times a night always having vivid nightmares, drenched in sweat, with what feels like no end in sight. Even if I get 8 hours of sleep I feel exhausted the next day. Ive been smoking weed pretty consistently for the past 6 years (stopping for a few weeks at a time because of job interviews or no money) and have never felt symptoms this bad. I don't want to resort to smoking before bed because I really need a job and can't risk failing a drug test. I've only been taking Prozac/other antidepressants for the last 4 months. I was wondering if the Prozac mixed with weed messed up my head and if there's anything I can do to help get rid of these symptoms.

TLDR; Night sweats, terrible nightmares every time I fall asleep, waking up multiple times a night, headaches, dehydration, after quitting Prozac 3 weeks ago, and Weed a week ago. Never had these symptoms before. Need help understanding and possible ideas to help me sleep.