As many have said, relax and follow the doctor's instructions. My surgery was on the 1st of October, stuffing (stent in my case) was removed on the 6th, and I dilated for the first time on the 19th (the doctors had told me that I should start when I feel ready, but ideally by the 22nd at the latest, so I was a tad early).
Btw: Do not expect the same depth etc. as you had initially when you dilate for the first time. It is
not lost, but merely needs nice and calm "training" over time; that's why you get that rather intimidating size assortment after all...

You should not be feeling any real pain while dilating, a bit of discomfort can happen, but if you hit the pain threshold then that part should wait until things have loosened up a bit more. For first 5 days I used a 2 1/4" x 5/8" dilator (compared to the 4 3/4" x 1 1/2" stent that was in there originally

), and am gradually working my way up. Don't overstrain it, as otherwise your next session can end up being quite unpleasant.
Regimes can vary considerably as well. I've heard of people being told to dilate 3x a day for 30 minutes, and others 1x a day for 5 minutes (which happens to be what my doctors handed to me). The main importance seems to be dilating regularly (i.e. at least once a day). Basically listen to your body and enjoy the gradual return of feeling in the area.