Hello, do the doctors really have their hands tied with this to discharge ...

Hello, do doctors really have their hands tied to write marijuana to someone who is not 25 years old? I was in a marijuana clinic because for over a year my stomach hurts almost all the time, I can not cope with this abdominal pain. I can't stand it mentally anymore for real. No medication works, I get tired of it all the time and the doctor told me that he could not write me out because I am not 25 years old. I know that marijuana helps me because I smoke sometimes just for these pains because it helps me, only the problem is that on the street most of my mj is sprinkled with chemistry and from this my stomach hurts even more. So can't they really write it off to me? even though I'm getting tired all the time and I just don't have the strength to fight this pain anymore because I'm not 25 years old? The doctor ordered to use CBD oil in the fact that I had already used such an oil for 3 months and nothing helped me. Is there really no way to help me with this pain?