You are probably adding muscle too. It weighs more than fat. When I ramped up workouts I saw the scale rise yet lost an inch at the waist. That kind of change is positive.
My target is 125 and I was sitting at 131. Signed up at the gym because it was time to move activity from very light to moderate so I could get strength and stamina back. Rode the bike there and back daily for nine miles round trip plus swam about forty minutes, and allowed a bit more food and protein so I would not feel wiped out. Scale hit 141 last night. I know the math on calories does not add up to real fat, but I ignored salt and had several salty meals. This has to be water and I am trying not to spiral while I go back to the prior deficit and keep the swimming and biking. Clutching the cat and repeating it is just water. Bodies are mean for hanging on to ten pounds like that.