Hiya Claire, dunno if you remember but just before Christmas I had the same, was off work 3 weeks on morphine n diclofenac, I too had major issues with using foot pedals in car and even applying the hand break....dunno how on earth I did it and woke up like it one morning.
To cut a long story short, they said it may be sciatica but then it transpired that you have two muscle groups than run either side of your spine to support it.....mine had torn away from the spine slightly at the bottom which gives identical symptoms to sciatica...Although mine was a dull constant heavy aching in the lower part near my lumbar and coccyx bone.
Just a thought!
Get well soon, I know exactly how your feeling!! xxxx
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