I am fairly new to Atkins...(Day 11) and tried to do the caffeine cold turkey - not a good idea! I had a massive headache and was feeling pretty nauseous as well. This lasted about a day and a half.
It may be difficult to do all withdrawals (caffeine and carbs) at once. I am now proceeding with weaning myself (altho I only had about 2-4 cups per day). I bought myself some primo deluxe sumatra decaf from Starbucks and starting mixing it with "real" coffee every morning. (I am really enjoying adding real cream now!)
I am now to about 75% decaf and 25% caffeine and feeling pretty good.
Also I understand the jello is not on the acceptable foods list (see
www.atkinscenter.com) so you may want to avoid it, at least for the first couple of weeks. I also read somewhere that the ready made diet jello is made w/Splenda? unlike the package kind which is made w/aspartame, so you may wish to investigate that.
There are also some diet sodas made with Splenda too.
Good luck and hope you have no major headaches!
Froufy