Thanks for the advice everyone. I went to see the doctor he said he thinks its "normal musco-skeletal back pain" - whatever that is?! He said from what I've told him he's not too concerned, it normally goes around 4-6 weeks, I just need to rest, use ice/warmth if necessary and do gentle exercises. Oh and he prescribed me loads of painkillers but I dont think I need them Side effects could be stomach problems and drowsiness, it's like substituting one problem for another
So I'm relieved the doc doesn't think it's anything out of the ordinary. Still doesn't really explain why it happened or what's actually going on in my back. I'm going to continue resting and perhaps start Pilates again next week (gently).
I had a sports massage yesterday and the masseuse reckons I stand like a bit of a gimp (lop sided ) so I guess years of doing this and exercising have given me bad posture. Need to concentrate on sorting my posture out and increase my core strength.
Will post back with updates!
a strong core would alleviate a lot of this, once the pain has subsided I recommend you take up pilates