I actually very rarely drank water at all haha, I was more of a Mountain Dew kind of guy. When I started vaping I made the switch to nothing but water and drink about 60-80 ounces of it a day now...
Didn't read all the answers, but dependable on how much of that Mountain Dew you drinked, it is very possible that you got your self addicted to a sugar, Taurine an rest of the coctail drugs pack, and now you are suffering consequences... Dizzy, headache, muscle pain, it all comes as a sign of body in a need of a stimulans. I drink a lot of coffee, and i mean a lot. At least 4 or 5 of them during the day, black coffee with lots of sugar. It does not affect my sleep, but if i don't get my morning shot, i get headache, dizzy, i'm sleepy and cranky all day and feel like i slept under the running train. Short breathe means that the vape style or the juice you are vaping is not suitable for you. Try to play with different ratios of PG and VG in your juice. Most people are stating they are alergic to PG, but the fact is only 3% of the world population is indeed alergic to PG, and those persons are also alergic to all kinds of different cosmetics and food products. Same goes for VG, but noone seems to believe it and thus they are all forcing juices with high VG content, nevermind some of them are suffering from short breath and similar sindromes related to over exposure to VG. If nothing works, reduce the power you are vaping at and increase the nicotine so your body doesn't crave for it. I my self cannot vape those subohmies, after 2-3 days i get heavy feeling on my chests and short breathe. Tried countless combinations since i make my own juice for the most part, no luck. Using my vape the same way i used to smoke brings things back to normal within 2-3 days again.