I totally agree with AndreaMarie. Use all the resources that you can get.
Do you keep a food diary?If yes, do you find anything extra reported over weekends?Also, it might be that you don't drink enough liquid on weekends.If you eat out a lot over weekends being on the go, keep some Lean cuisine handy for those times. Frozen dinner is still not good but portion controlled no doubt.
Whatever it is, as long as you don't gain over the weekends, that is an accomplishment