Hi Triplemom,
Congrats on your good start. Everyone is different, so you will have to see what works for you. Some people on here did not give up aspartame and caffeine without any problems, others can't touch the stuff. I would suggest that you could cut it out of your diet for a week or two and then decide if you want to add the Diet Cokes back in. Also, make sure you are still drinking your water in addition to the soft drinks. Good luck.

Marie