Remember shape changes as we get older. I went up 2 dress sizes over the past few years and assumed I was putting on loads of weight. When I finally weighed myself a couple if weeks ago I discovered I am still the same weight as I was 10 years ago before I was pregnant!
I don’t know how much weight I’ve lost on keto, but I do know that my waist is 5" smaller, my bust and hips have also lost inches and I had to tighten the laces on my trainers this morning (was not expecting that!).
It might be that you get to that teenage shape, but at a different weight than last time.
You’re looking for a slim shape for your holiday. Well, it might not be where you want it to be, but it will be better than it is now. You’ll feel better, have more energy and be more confident and that is what people will notice, not that you’re a few lbs off your goal weight.
(Edit: weighed yesterday 3.5kg 7.7lbs down in 2 weeks)