I would avoid a Chiropractor at all costs!

has your Physio advised a scan of the back if not ask him for a referral letter to your GP.

It depends on how serious your problem is but if its a mild problem or sciatica keep working with the Physio.

Do the exercises regularly, walk as often as you can and also swimming helps (not breaststroke) and avoid heavy lifting

Think about your posture and take up either Yoga or Pilates.

Eventually the problem will subside