So i got blu e-gigs (low cartridges) because I smoke Marlboro ultra lights. Anyways I started to slowly transition to the blu's so I would substitute a analog for blu every few hours and noticed I was getting pretty bad headache's until I would smoke a regular cig. I would also feel a bit edgy and not fully satisfied. So I spoke to some people and actually called blu. They recommended I went to the medium level cartridges. So I did. I like blu, I don't mind the price and like the taste etc. anyways, the medium cartridges arrive and I give them a shot. Used the blu instead of my regular analog and felt fine. Felt satisfied. Didn't feel edgy or craving a analog at all. So I went ahead and used the blu in place of my next 4 analogs. (I smoke 1 cig a hour, Im on a routine). So I went 5 hours without smoking while awake which I haven't done in YEARS. However a few hours before I go to bed I smoke one more time so I figured hey I won't do too much right away I will have a regular analog for my last one and tomorrow I will cut back more and more etc. I'm feeling great, excited and thankful that this looks like a real possibility that I can get off analogs. Just a tidbit of info I have had anxiety/panic attacks for years so i seem to notice every little change in my body. But honestly I'm feeling confident and great. Well I go to bed (same time every night, again the routine). And I can't sleep to save my life. Which is totally not normal for me. Im on anti anxiety meds and small amounts of xanax so sleep is never a issue for me. Anyways, I end up only sleeping maybe 2 hours... I wasn't anxious or anything I just could not sleep at all, my brain would not shut off. Anyways Ive spoken to my doctor and he gave me the go ahead to switch and has many patients who have and actually recommended it. So me being over analyzing etc. this totally threw me off track and today I just smoked analogs as usual while trying to do some research. I'm just trying to wrap my mind around what could of caused this insomnia. I know everyone is different and I'm looking for medical advice just opinions and support and maybe some suggestions from anyone who may have had a similar experience. I am determined to switch, however Im trying to limit the side effects or ease into them as much as possible (if you couldn't already tell). Anyways thanks for reading and I really truly appreciate anyone's sincere advice/thoughts/feedback.