Please help me out . . .?

During the week or so before my period I get the worst cravings. All I want to eat is junk food. It's all about chocolate, potato chips, ice cream, etc. As soon as I start, however, my cravings drastically go down. I go back to eating healthy. Lots of fruit and veggies, lean meat, which I love. I don't have a hard time eating healthy other than that week before I start. So I guess my question is, does anyone out there have any remedies? I wouldn't mind taking meds over the counter if someone has tried something that has worked for them. Any advice would be awesome. Thanks!