I was too large to fit on any scale but my surgeons, so I had no way of knowing if I lost weight until my first weigh in, a month after surgery. Spoiler, I lost weight. Ultimately, it all worked out ok for me.
Scales lie. Every day if you give them the chance.
Scale comes from two greek roots: 'Sca' (Ska) meaning 'crap' and 'Le' (Lie) meaning 'to mislead', so 'misleading crap.'
Good luck,
Tek