That's amazing miss_mcvicar!!
You've done fantastic so far, and I'm sure you will get that pesky half a stone off, sometimes it can take some time for your body to adjust to the plan, and I can imagine that your HRT will have an effect somehow.
You've said you feel much happier on SW than you did on your previous plan, so it seems to have made a difference to your relationship with food, and it's a healthy way to lose both inches and pounds. Don't be disheartened, as long as you are sticking to the plan, you will get to where you want to be
But you have done amazing to lose 13.5 cm!! Fabulous