I had bad SPD in my first pg with DD aggravated by hypermobility, a previous horseriding injury and a bad fall at 20 weeks which seemed to kickstart it all and I ended up in a wheelchair, literally screaming through the nights.
This time it started at 9 weeks
and now at 10+4 I'm already strapped up with the belt, struggling to walk too far, wincing getting in & out of bed & the car and up & down the stairs... I am starting to really panic that if it's started this early and got this bad this fast I'm going to be in the chair screaming again by 20 weeks. Last time I got to 37 before I was crying and begging the hospital to get her out now as I couldn't take anymore. I can't take 20 weeks of that!!! 
Any advice at all? I saw a physio & osteo last time, started with belts & crutches & I hired mobility aids from the Red Cross when it got bad, slept with pillows stuffed everywhere, knees locked together as much as poss, to be honest it all did bugger all!
Anyone know any real remedies??
Also can I sleep in the belt? I didn't find the belt much use at all last time but seems to help more this time, just worried about squishing the babies head if it rides up in my sleep! 