Spd at 25 +4 weeks

I’ve recently started having issues with pelvic pain and I was diagnosed with spd. I bought a support belt that doesn’t seem to be working at all. I can not sleep longer than 4 hours due to the pain that develops in my knees and I can’t walk due to the pelvic pain. I am at a complete lost as to what I could do to relieve some of this pain. The only time I feel some what comfortable is when I lay on my back which i only do briefly. I had a complete breakdown today when I could not take steps to go to the bathroom. I have 14 weeks to go and I’m not sure how I will make it. Any advice will be greatly appreciated.