Naltrexone for alcohol dependency????

I've realized that my drinking is a problem. I have pretty much used it all of my life to "cure" anxiety and to lessen my inhibitions so I wasn't so nervous and shy in social settings. Obviously, the wrong plan of action...However, in the past year things have gotten worse for me and I have been drinking literally everyday. I realized about a week ago that enough is enough and have stopped but I keep having big urges to drink and my anxiety is up, I am very irritable, depressed, and experience insomnia. I just want to better my life and stop being controlled by alcohol. I would like to go to therapy but am also interested in naltrexone to ist in my recovery process. Anyone take this before? How long and how much were you drinking? Did it help? Any advice would be greatly appreciated as I really want to get better once and for all thanks :)