I am going on my second month on the vivitrol shot and it is causing me to feel out of my element. I can't sleep. I have no appetite except for in the middle of the night. I've been clean for over 2 years and recently have been having using thoughts so I used it as a safety net. I have a ton of anxiety and I feel paranoid and stomach cramps. I also have shortness of breath and almost like a hung over feeling. When does it subside? I'm on day 3 of the second injection... Ugh!!!