Tatia, you are not a "psych" case -- LOL!!

Here is a link to a thread by Annie that might explain what is going on:

http://neurotalk.psychcentral.com/thread80534.html

In case you don't want to OR can't look at this thread, caffeine (Diet Coke) and nightshades act like Mestinon (peppers are in the nightshade family -- cayenne pepper is an ingredient of Buffalo Wings). So, you are, in effect, medicating with food.