Chronic Vomiting and Cannabis Use: Seeking Advice

I saw my doctor yesterday as I've been vomiting for over a month nearly everyday which is more than my usual amount. the doctor tried to blame it on my cannabis use and asked me to stop but this is going to be so difficult as it helps with my pain and anxiety but she's thinking its caused cyclic vomiting syndrome even though marijuana is used to treat that... so I'm confused. Has anyone ended up with chronic vomiting due to marijuana use? I don't know anyone who has suffered with CVS when they smoke marijuana so I'm finding it hard to believe this to be cause of my vomiting when I have a hiatus hernia and fibromyalgia which have often caused me vomiting in the last few years