Hello Been vaping for the last 24 hrs a 100%VG nic salts by kai virgin vapor. . I really wanna do the switch and tired of smoking and the nasty side effects. Since yesterday I have been feeling like my back muscles are tight. No pain, but I feel like a need a massage. This happened to me too last time I tried to switch to vaping. What could this be ? Should I just tought it out ? Anybody exer experience this ?