Sabby, it's a rare person indeed who doesn't have
some water gain during their TOM (time of the month).
No matter what diet I have been or not been doing, I always gain about 5 pounds during TOM and lose it all in one day (a rush) after TOM is over.
You don't actually gain any
weight...it's all water and nothing to worry about. Just something to be aware of so if you see the number get higher that week, you know why. It'll go away after TOM, so just stay on plan and don't stress, okay?