I second what painpaingoaway said. I am 9 weeks smoke free today because I started vaping (e-cig). And exactly as she said - don't get the ones that look like actual cigs - get the ones that look kind of like the neuralizer in Men in Black (No, seriously they do - for the first 2 weeks using mine, I kept holding it up to people saying "Look this way" )
But in all honesty, I quit smoking 25 years ago and started again when H & I were separated (4-1/2 yrs ago) and just quit again, using vapor cigs. Again, like ppga said, if you get the right nicotine level and flavor, you can barely tell the difference, except your hand motions are different and you get used to that after a little bit.
And it's much cheaper! Hope your back feels better soon!