I stopped smoking pot. I hate my life now.?

So I was smoking daily for about a year and I just gave it up because it was getting boring and I felt mentally addicted kinda. I stopped maybe a week ago and since that I have been eating less than 1000 calories a day and not sleeping. I used to eat all the time, even before I started, now I have had to force myself to eat so I don't get seriously ill. I also have headaches and anxiety. When will this bs stop? It's not debilitating, just so terrible.