hmm.
I have it too but i wasnt thinking it was sciatic pain because it feels more crampy and achy, and the only time I have had sciatic pain it was like a numbness that made me collapse on the floor, cant feel my legs kinda thing.

makes me wonder now, might be taking my own advice..

Maybe ask your carer about it or see a physio or oseto - your carer might even be able to refer you to one thats associated with the hospital.