This blooming preg is driving me mad! The MS is not as bad now (am 19+weeks), but now the base of my back is aching, with the 'pain' going down the back of my legs too. It's not like an 'ow' pain, it's like when you hit your funny bone - kind of like a fizzy but REALLY IRRITATING ache. What is it? It's stopping me from sleeping as I can't find any position that gives me any relief! Arrgh!!!