I am a 40 yr old female, petite at 4ft 8ins, about 7-1/2 stone - I have been feeling numb pains in my arms and legs, I have in the past felt these same pains just before starting my period, but over the last few days have experienced them, more evident when I'm in bed. I have in the past had sciatica but it hasn't caused me any probs that I'm aware of, of late. .?