good luck hun. It always seems harder to go back but when you get the right mind set it's easy - this is my 3rd attempt, before never mad eit past 3 weeks without completely blowing it and this time i've been 100% since the day i started.
As for how much to take with you, it depends on what your CDC charges for products. might be worth giving her a call to ask so you can get a rough idea, my weekly supply is usually 38.20 although i think the prices have gone up a little since the 1st may.
all the best hun! xx