I have googled but am none the wiser. It really hurts 
It is in my lower back, it gets worse if I don't move for a while. Standing up is agony and I can't pick up my dc (luckily they are old enough to understand this). It doesn't seem to be spreading down my buttocks or causing any other pelvic pain.
Have I got spd or have I just done something to my back which is not pregnancy related? I remember that I couldn't roll over in bed last time I was pg without it REALLY hurting, but that was later on. I am five months.