If it was a thrombosed hemmy, then you probably are going to be alright and it may have no effect at all, G. Here's hoping the first BM went OK and you never have to touch that vicodin, but listen, if you need it, take it!! You have the MOM to back you up on that!!!
The first few days may find you sore down there so don't fret about it, and if you see a little blood even three weeks from now don't fret there, either...remember, your fissure still has to heal, things are set up for healing now but the LIS didn't "fix" your fissure, it is just paving the way for healing.
Oh, and CONGRATULATIONS!!! Here's to getting your life back again!