I always go by my lowest weight. When my weight goes up, I do not stress about it because I only go by my lowest weight. So when I was weighing 142 lbs I stalled ( atleast weightwise ) and often say my weight go up as high as 146 lbs. It didn't matter, I only considered myself as 142 lbs. Now, my weight is down to 137 lbs but it has gone up as high as 140. I only consider myself as 137 lbs. I am peri-menopausal and I take this stubborn weightloss as part of the nature of my body wanting to hold onto fat and water. But eventually, it lets go. That is good enough for me.

Black57