Sorry about thinking you brutally murdered your kid. Well, at least about thinking you directly murdered your kid. You still sexed her up so much that the kind of perv that usually has to go to Thailand to sate his desires decided to get some at home.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.