Tell my sleep specialist I smoke Marijuana?

I am only 15 and I have Insomnia. I go days on end without sleeping. I have been on many medications including Ambien. I started smoking Marijuana recreationally then learned it helped with my insomnia. My mom found out when she drug tested me and now I am not aloud to go anywhere because she thinks I will smoke. I'm back to square one going days without sleeping. It's horrible. Should I tell my doctor about all this and ask her to talk to my mother? And honestly I would rather not be on prescription medication due to overdosing and addiction fears.