Hi, firstly OUCH! I feel your pain!

My first pregnancy I only had slight pain on the left side of my pelvis & my left leg sometimes gave way on me. Nothing major.

With DS OMG it started at 20 weeks & got worse as the pregnancy progressed (sorry not what you want to hear but its what happened in MY experience). I found that I could sleep while in a sitting up position on the lounge with a million pillows stacked around me keeping me upright while I fell asleep. I would still wake in pain at times, I'd also get a very sore neck from my head falling forward while asleep, sore teeth from them being forced together through the night from the angle my head was leaning & also dribble really badly because at times my mouth would me open while my head was hanging LOL (All in all such a pretty picture hey!)

At about 36 weeks PG we were pilgrims for World Youth Day, I did one day walking & could hardly move at the end. We had to keep stopping & sitting along the way. I took the next day off (stayed home) then hired a wheel chair for the rest of the week. A bit embarrassing & inconvenient getting around but WELL WORTH IT. So I recommend if you have any "big days" coming up that you dont want to miss out on, hire a wheel chair so you dont have to miss out or be in massive amounts of pain. It was quite cheap too.

I couldn't lay flat at all, as it was getting worse over the months while I was still able to sleep in our bed, I'd have to hold my breath & quickly try to "throw" my body over to "roll over". I usually just stayed on my left side so I didnt have to move at all & could roll out of bed in the morning.

I recommend the use of lots of pillows for support! Between your legs too (which you're prob already doing)

I couldn't lay flat for another 7 weeks after having DS, it dragged on but I guess its not that long in the scheme of things. Others have had it worse. Some are back to normal after having bubs (Wishing this for you)

I hope you find some relief, its horrendous pain & its the only thing that puts me off having another baby (I still want another though!)

Good luck!