Hi Kizzle and welcome to ecf.
Just remember that e-cigarettes is not like old fashioned cessation methods where cold turkey is the ONLY way to succeed...in fact most of us here did it gradually.
There IS a learning curve with e-cigs, and sometimes it takes a while to find your special combination or formula. So please don't place any unreasonable expectations on yourself and create undue stress. Remove the burden of the "Q" word and all its baggage from your mind, and just have fun and enjoy the journey. If you smoke one, don't sweat it, just focus good thoughts on the ones that you didn't smoke.
so forget the "Q" word, keep on vaping, and above all, enjoy the ride!