Carry on walking

I seem to have hurt my back. I had a heat pack on all day yesterday, to no avail. So today I tried a soak in the bath. It felt better for about 10 minutes but then came back :-( It was a beautiful evening so I thought I would go for a little stroll to see if that would ease it. Fine when I'm walking.....hurts when I stop. I had better just carry on walking then......