I've only recently realised I've got SI joint pain, it developed on my last pregnancy but just thought it was sciatica! I've always had it since and always blamed it on sciatica, even the doctors have! It's always a very specific spot on my lower back where I get these dull ache that eventually turns into a throbbing terrible pain. Sometimes goes down my leg too. Always starts in the same sitting position! Well last night for the first time I got it in bed, no matter what side I was on it was agony, pillow between my legs did nothing. Eventually I got the massive pregnancy pillow out and kind of suspended my back and that sent it off. Does this sound like SI pain ? And can I expect every night to be the same going forward ? I'm 16 weeks