(((Hugs Emma))) don't worry over the cake and scone, you've been good sticking to plan and all your swimming and walking will have covered you eating them.
As for your 16‘s getting tight, remember that it's not what you're eating, it's the drugs and if you need to go back to a more comfy pair it's not a fail, it's only for a short while and wear them with pride as they represent all you're doing in your goal of becoming a mother ((( X)))