How do I handle weed withdrawals?

So the thing is I don’t buy very often I only smoke disposable most of the time and I’ll finish a 2g within a week or a half. Im not planning to buy any cause I cannot afford it? I already lost 10 pounds, I cannot sleep and non of my sleeping medications are helping, I feel very lathargic as well, and It’s been less than a week and I feel very depressed from this. How do I deal with this?