My bitter taste buds came back first, too. I'm pleased to report that after a month, my taste buds are starting to stabilize a bit now, although I have to admit that I never knew I liked sweet stuff quite as much as I do. It came as a surprise!
In the meantime, I recommend using either a bit of cream in your coffee to cut the bitter taste, or making a "simple syrup" of water and sugar and keeping a bottle of it in the fridge. It's easier to add a few drops of simple syrup when stumbling around in the morning than it is to measure out however much sugar you want to add to cut the bitter... and if you don't want your coffee sweet-sweet, just those few drops of simple syrup wipe out the bitterness. There's plenty of cooking websites around that'll tell you how to make the simple syrup, and a little goes a very long way.
As far as your cig model, I'm going to recommend that you consider moving to a setup that's about the size of a Sharpie marker instead of one of the cigarette-sized types, if only because the battery life is longer and you can find cartomizers pretty much everywhere. The Riva or kgo options are great, egos work well too. They're all 510 thread size, so anything that fits on a 510 will work with them, plus you have the option of getting stuff that is ego-threaded as well.
... Is this temporary or will it go back to normal?
