hi uome, i'm sorry things are rough for you right now. narcotics anonymous may be beneficial for you to get off the drugs. it's free and you can google NA for meetings in your area. NA is a group of addicts who learn about their addictions and discover how to not use and to have a new way of living.
your mom is toxic to your getting off drugs and also how to deal with her. there is also a program called alanon for people like you that have a loved one in active addiction. that support group helps you to learn how to not be taken hostage by the addict, helps you learn how to love yourself and rid u of guilt. it's for helping people like you to learn how to not enable the addict's behavior. i suggest these 12 step programs cause i know many people who have discovered a new way of living.
you might want to post in ACOA forum too to share about your mom. there's support there too for you if you desire it.
i wish you the best..hugs...and we're here for you