I think my scale's defective

I hopped on the scale every morning for the last few days and it has my weight up by 3 pounds roughly...so I think my scale is mad at me....my eating has been ok, not stellar but I exercised twice this week. I went on a brisk 3 mile walk on Thursday and I went back to gymnastics for the first time in awhile yesterday. I'm sore from gymnastics. I went grocery shopping today so the house is full of great food....that was my problem last week. When I buy fresh stuff, I eat it...and love it...but when I'm living out of the freezer and cupboards....it's all carbs and less nutrition...but I can't afford to shop weekly. Maybe I need to find a way to so that I'm excited to prepare food all week long...I need to start setting goals again and I need to start exercising more. I need a new job too...I come home so burnt and stressed that I can't imagine moving any more but maybe I'll feel better if I start going for walks and hitting up the gym. I think I'll set some goals soon. My sister and I are going to start a contest where who ever doesn't lose the most has to buy the other one something. Finally - I have a bunch of clothes, size 14,16, 18 that don't fit me....I was wondering if any one would like to buy them from me, for cheap...I usually sell them on ebay but I like my readers so much more....most still have tags....they're just taking up space. Let me know!