Listen friend. It took me 15 years to realize I can't process caffiene. A diet coke at 1 pm and I ain't sleeping.

Ive given all caffiene drinks up since 2010 and never going back.

I will have a little green tea, chocolate, chocolate desserts in moderation and decafs from time to time.

Its doable and do not worry, just let it go and embrace the decaf world :)