I got on the scale today and found I had gained 2 pounds. That's on top of gaining a pound yesterday. Why?

According to NANY, my net carbs should be 20 gm or less, protein 110 gm or less and the rest fat for a 1500 cal/day (NANY suggests 1800 cal for women but I reduced that). That's 5% carbs, 25% protein, the rest fat.

I have a computer program where I track my intake.

For the past week, I ate protein 23%, carbs 8%, less that 20 net carbs, That's 79 gm or less protein. 1343 cal average

Past month 1350 cal, 20 gm or less net carbs, 88 gm protein. Average

I went back on Atkins on Nov 26th and quickly lost 6.5 pounds and stayed at that weight till yesterday.

I am wondering if I am not eating enough protein. Too much fat? Net carbs are under control.

I am elderly and physically handicapped. Suggestions on physical activity (I do not lose weight with physical activity) not wanted at this time

Suggestions please--