i have had same sort of thing on and off for a couple of years,the simplist little movement can trigger my back going into a spasm like state which is agony but luckily only lasts a few minutes,afterwards it can take 15 seconds to 15 mins before i can put my left foot flat on the floor and walk on it again, in the mornings i used to take 20 mins just to ease myself out of bed,and could only put trousers ect on by using a coat hanger to hold them as i could not bend down at all,and if i droped anything on the floor before midday it had to stay there as it might just as well been on the moon for all the chance i had of picking it up, but mine has been helped an enormous amount and reduced greatly in frequency since we bought a tempur bed if you dont already have one go to a shop and try one, they are strange at first but i can not recommend them highly enough,expensive but worth every penny