Stapfam, I am sorry but I didn't realize that you were having back problems and were not riding... That had to be hard. I've had back problems and they are, well, a problem. But, not being able to ride makes it all the worser...
But welcome back to the saddle! My thoughts will be with you as you continue getting back up to speed.
It sounds like you are being cautious. But I will issue the issue warning anyway of "don't push it too hard!"