I would also add that congrats on trying to drop the sodas...but if you are currently drinking 4 and drop to none, you WILL experience withdrawal symptoms: headache, sluggish feeling, tired, nervous, etc.
Try to gradually decrease them for the best results. I have basically cut caffeine out of my life, but I did it over 4 months, slowly decreasing, so I wouldn't get bad withdrawal symptoms. Caffeine is a drug, and like any drug, the safest way to get it out of your symptom is gradually so your body doesn't freak out.
But that's my two cents.
