Six weeks into a stall around week 30, I did something I'd been avoiding: I logged my weekends honestly for 14 days. Weekdays I was tight, like 1,600 calories, protein and everything.
Weekends were "not tracked" which translated to Friday dinner out, a couple drinks, Saturday brunch, Sunday takeout. When I actually added it up my Fri-Sun averaged 3,100 a day.
My real weekly average was closer to 2,200, not the 1,700 I'd been patting myself on the back about, and that's roughly a wash against what I was burning. The reversal was what fixed it though: I didn't cut food overall.
I ate a slightly bigger dinner on weekdays and added an afternoon snack, and I capped weekends at one restaurant meal with no alcohol Friday.
Weekly average only came down maybe 200 calories a day, but the scale moved 5 lbs in three weeks after sitting still for three months. Monday mornings I was also four pounds heavier than Friday mornings every single week from restaurant sodium, which made the stall look worse than it was.
Worth two weeks of honest weekend logging before you assume anything else.