Smoking an analog here or there is A ok. Nothing wrong with it! Now smoking a pack a day is BAD.
I still have a RYO(roll your own) once a day. I had to quit smoking my old green friend recently, and have been heart broken, in a BAD BAD way. Having an analog really helps my mourning the loss of Mary. So i have an analog and use V4L the rest of the day!
In the future though man, seriously, pick up a 30ml bottle of a flavor you can stand, keep it on hand, just in case. Or even a couple 5ml bottles of a different flavor. That way if you run out of carts, you can fill em back up til' your order arrives, anxiety solved, and no need to get some real smokes. 8v)