I think the first thing is to stop "self-medicating", the drinking,pseudoephidrine,etc. Then next, though you do not want to, is to please contact your pdoc and/or whoever prescibed the prozac, I personally feel what you are going through is not just the prozac, but all the other stuff combined.
I really hope you get professional help, you may be approaching a manic episode.
When I used diet pills years ago, I felt great, full of life and energy,etc. then over time crashed and gained almost all the weight back,etc. the crashing, plus family matters, caused me to have suicidal thoughts and was encouraged to volunteerily sign myself in for treatment, I was DXed as being Bipolar-II(mild) and followed treatment plan. I do miss the amphetimines, energy, being thin, I don't miss the crashing, sooooooooooooo, I keep with my pdoc appts. every 2 months, yes, went from once a week to once every 2 months by following treatment plan.
To help yourself, you'll need to get professional help.
I wish you luck with this. Please keep faith in yourself, with treatment and commitment, you can get through this.
Take care,
DE