Getting a medical marijuana license in Colorado?

I was recently sent to jail for a dui. While there, I went into a manic state, so they sent me to a mental hospital. While at the hospital, I was diagnosed as a bipolar-schizophrenic. My question is; can i use this info to get a license for marijuana? The reason I smoke it is cuz it calms me down. I cant sleep without it. They have me on lithium and zyprexa now, but i would much rather just be on medical marijuana. It is safer, and it has less side effects. Is it possible to get a license in my case?