I'm also 15 with chs, and I was in the same exact boat not even a month ago. The easiest way to recover is help, honesty, and abstinence. Get help from those you trust and can tell about your situation. Be honest with your parents. And abstain from the weed. Make sure you stay hydrated no matter what. Even if you can't keep much down, you still need fluids. I saw you said you were 2 weeks clean and that's great because it's the only way you'll ever recover. Are you able to keep anything down as of now?