Coffee and Caffeine FAQ

I was drinking 6-8 shots of espresso from my espresso maker in the morning, or a triple latte from starbucks- then following up with regular American coffee at work throughout the morning- sometimes an additional 3-4 cups. Then a tea or soda with lunch - I was feeling like crap by 3-4 with a huge drop in energy and it really didn't "supress" my appetite as some claim.
Last week I stopped my espresso in the morning and started drinking the coffee at work.
Yesterday Sunday I had no coffee - I was unusually tired all day.
Today I made it through but had about 1 cup around 10am and a diet pepsi for lunch - by end of day I had a hurendous headache- it's just so hard at work - the smell, the habit.
The taste wasn't as appealing as before and I did not finish the coffee or soda.
I hope i can shake IT by end of week- who knew something like this could creep up into your life so quick?!?!