help me please...

I almost fell down my stairs this morning but I caught myself. I am having a hard time with spd and am at the point to where if I walk, or turn in bed or try and move my pelvis, my pubic bone to the back of my butt hurts so extremely bad, I scream out in pain. My husband was up all night because I couldn't get comfortable and I screamed the whole night every time I would try an reposition. I feel like I can't move, and I have a five year old to take care of and I am a sahm so I have no choice but to do laundry and chores and get her ready for bedtime and school. I am in so much pain I can't take it. Please someone tell me how they managed the pain. I'm 35 weeks today