To be honest with you Stanley, I suspected a stress fracture but as I cannot feel my way around your back, I was very concerned that you had an x-ray or MRI scan prior to any treatment. Sometimes deep tissue massage can make the situation worse without knowing what you are dealing with. I really cannot encourage you get an x-ray or MRI scan enough. Personally, as a soft tissue specialist, I would not touch you without seeing scan results. Go back if the issue continues and persist.
As for touching your toes, you need to hinge at your hip and not bend your back at all. Try this...
Put your hands behind you and place your palms on the top part of your buttocks. Squeeze your elbows together. Now lower slowly with straight legs, making sure your back does not bend but kept straight. Only go down as far as you can without it hurting. It really does not matter how far you go down... just that you keep your legs and back straight!
As for touching your toes, you need to hinge at your hip and not bend your back at all. Try this...
Put your hands behind you and place your palms on the top part of your buttocks. Squeeze your elbows together. Now lower slowly with straight legs, making sure your back does not bend but kept straight. Only go down as far as you can without it hurting. It really does not matter how far you go down... just that you keep your legs and back straight!