I have been using my e cig now for one week. I was smoking a pack a day of the Marlboro menthol silvers. I thought I would go with the strong dose cartomizers first (24mg) The TH is great but it seams like my heart is racing a bit after vaping. I have smoked for 27 years and have not touched an analog for 6 days now. My question is do you think going to 18mg will still have the same TH as the 24mg? I just want to feel like I did after having an analog, not anxious or jumpy. (kinda like having too much caffeine) I also don't want to feel the overwhelming need to light up again either.