Welcome! A lot of people here have a lot of wisdom, much more so than me, so I won't give you any advice other than to take care of yourself.
My wife started using pot at a young age to self medicate or cover up other issues. That turned to an addiction that tuned to meth for a while, then seriously to perscriptions and back to meth when those weren't available. So it can get worse. I tell you this not for you to use to push her, you can't. It's for you to think about so you start setting your limits and boundaries. I knew nothing about all this until I started reading and talking and learning about codenpendancy. It was eye opening to see how much damage all my pushing and controlling was doing to both my wife and myself.
Stick around, lots of good stuff here.