Dear AnnB,
When did you start having this cravings?
You need to find the cause behind it.Is it that you are a homemaker with 4 children to tend to.Sometimes the routine kind of life and just being in Kitchen results in such status.Try some positive occupation apart from housekeeping.Visit places where you see less of food or think less of Food.Read in a library or take up some aerobics classes.Simply go for a walk when craving strikes.A sedentary life can give rise to such pttern what you have described.I'm sure some physical extra activity will get rid of some toxins and even your sleep cycle will be better.You definitely need extra will power for that.
Try to find a classical homoeopath nearby who can help you with appropriate medication to achieve what you want.
All the best