Hi chick - You have to do what feels right for you at the moment. You have lots going on and healthy eating will be the last thing on your mind. Kel is right if you need to take a break until things settle down, then do it. You know you can get back on it, its just the willpower to do it. You could put a couple of weeks holiday in at group and then see how you feel when you know whats happening with your dad. Your C will understand hun and tbh they should relax things a bit for you.
The support is here for you whatever you decide. Its hard I know ive been there when I was on WW. Chin up hun xx