Yesterday I had a sudden excruciating pain in my lower back, which felt like a pulled muscle. It is still pretty sore today and is particularly bad when I bend over. Lying down is ok, and walking and going up the stairs are not particularly painful. This makes me think (hope!) that it's more likely to be a pulled muscle, but how do I know for sure? Any ideas? I am 26 weeks.
check out www.pelvicgirdlepain.com for lots of information and tips. Perhaps you'll be able to look at symptoms and see if they're similar. I would book an appointment with your mw and explain to her if it doesn't stop in a few days.