Andy, I've often posted about these things on the forum. It can take our bodies a while to catch up with the weightloss. By that, I mean that we usually lose weight from places we'd rather keep it - for us female sorts - from our boobies, arms and a lesser extent legs. In my case, I ended up very slight indeed, and whilst I didn't have sagging, my skin wasn't as taut as in the past. Given several months (and no for me years), it is by-and-large much better.
I have always moisturised every day after my shower, and I'm sure the moisturiser, and massaging in helped, over time. Maybe you could try a bit of that. If you don't want anything perfumed, E45 is good, or more to a budget, the Lidl sensitive and Aloe options are far better than their price tags of under £2 a bottle would suggest.
Give it time. Be patient would be my advice.
I know. I know. I say this as the lest patient person in the world.