How do I quit smoking pot?

Very hard question for me to ask... I have a few mental disorders and emotional problems. I have been smoking marijuana for many years. I did quit for 3 years, but during that time I was seeing Psychiatrist and taking a few different medications he prescribed me. (They helped calm my nerves like the weed so I didn't need it any more). But I forgot to write one of my appointments for the mental health center down in my calendar and missed it, so they completely took me out of their system and refused to give me any medications until I registered again and waiting to talk to the dr. again. I'm ok with that. But now they won't take me because they only have two available psychiatrists and are taking referrals only. My primary doctor I was assigned with is an a**. So I doubt I'll get a referral from him... I really need to quit smoking pot like, soon. So any idea on what I can do? Please and thank you.
How do I quit smoking pot?
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