Well, the upside is that everything that you described in terms of your emotions being all over the board from day to day is not abnormal in the least. Early in my sitch I was living that way from minute to minute it seemed.
I honestly think that your wife is just sorting through things. Let her. Let her do it alone. Temp taking, R talks, etc. only serve to pollute the process and does not work in your favor (I am speaking from a place I know).
There will be stretches of time where you probably won't hear from her. It's key that you learn how to handle it. Stay busy (as you have been), visit friends....leave your phone at home or in the car!
Based upon what she has said to you she is at least CONTEMPLATING coming back....that is a good thing. She also hasn't filed for divorce (I don't think) -- that is huge as well.
Do your best to give some space and don't make your happiness dependent upon whether or not she reached out to you. This whole ordeal is a marathon for sure - and it won't resolve on our timelines.
