Hi Sparkle,
First of all Hun you have to do exactely what is right for you and whatever plan that is then you know you always have the support you need when you want it from here.
Let me just tell you that i know exactely how you are feeling at the moment, i tried and tried to get back into CD and only ended up making things worse for myself by feeling like a failure everytime i didn't get through a day. CD is very very hard and i have now come to the conclusion that there is noway i can ever do it again. It has taken me 6 months, lots of tears, lots of restarts and the regain of 2.7 stone to get realise this. I guess what i am trying to say is that you are not alone in how you feel. If you really want to do CD then you should just take one day at a time and don't over pressurise yourself with thinking of how long you have to be on it for to reach goal.
However if you decide to come back to WW then at least you know you have tried cd and you haven't done too much damage with regain.
One bonus is that when you have tried cd then you come back to WW you realise how nice it is to eat food again and you seem to have more willpower than before cos you know how much harder it is on cd if that makes any sense at all.
Anyway hun good luck with whatever you decide, you won't be judged or made to feel silly at all here as i have learn't.
Lots of love Busyxxx