Fed up with overall health

I just don't know where to start.

I feel so unhealthy. Inside and out. I have no energy, often no desire to do anything but eat and complain about my bad health. I've gained over 20 pounds in the last six months. I'm @ 63 inches and 170 pounds. I've been browsing the forums for a few weeks and I want to heal, but I can't seem to find the will to begin. I attempted a master clanse for a whole 3 days before I caved. I can't go a few hours without wanting to eat something. I work 12 hours a day and often 6 days a week, so I overdo coffee and junk food all the time. It's like I'm always trying to catch up on the last night's bad sleep. I want to lose at least 30 pounds, regain the physical strength I once had, cleanse myself inside, but I just don't know where to start. Any words of wisdom would be so appreciated.

Samantha Tweet