Unbearable Lower Back Pain in 1st Trimester

I actually found this place by googling unbearable pain and found someone else's post. She ended up disappearing and no one answered except to say they thought it was a false pregnancy.. here's my story, and I need help-desperately.


I am 10 weeks pregnant, I had barely any symptoms, I was just late and it was postitive. I went to the doctor on Sep 11, did the ultrasound and saw my lil one. Everything looked good according to doc, and I was on my way.
Last Saturday evening my lower back started to hurt-for no reason. I have had lumbar lower back pain in the past due to weight issues, but I lost all the weight and had no issues for at least 2 years now.
This low-back pain is actually like my tailbone, in my bottom, radiating into my butt cheeks and down both legs.
I went to bed early, anticipating it would go away, perhaps I pulled something.
I woke up, worse. Changing positions, from sitting to standing, laying to sitting, etc.. were excruciating and made my eyes water and I couldn't refrain from crying out most of the time.
Monday morning I went to my chiro, he adjusted me, told me to ice it all day. Did that, no change. Tuesday morning I went back, another adjustment and he wanted to do xrays but since I am pregnant, we didn't. He sent me to my General Prac. He gave me codine & a muscle relaxer, after consulting with my obgyn on what would be safe. They told me to stay in bed till Friday. Done. Laying in bed is bearable.. but I can't reach, twist, etc. Getting in and out of a car is miserable and a slow process. My whole lower back tightens up with spasms and it feels like my spine is broken!
Monday I returned to work, and I have an office job. After only 2 minutes in my desk chair, when I stand up, my legs give out, and my lower back spasms up. It takes laying down on the floor, or trying to work out the spasms by hobbling around to get it to go away. Once I can finally straighten out, I can walk around fine. But this is day 2 of every time I have to stand up, I deal with unbearable pains.
I called my GP again, told him I am no better. He is really at a loss. He said he'd like to do xrays, but with the pregnancy--doesn't want to do it.
He has no answers, no one has answers.. and I am falling into a depression from the pain being so bad and having no solution or end in sight.
Any help, anyone know what or why this is happening?
I have tried some exercises I have read about for pregnancy sciatic problems, pelvic tilts, mini-crunches, etc.. none of them help in the least.
My lower back and legs feel bruised & weak from all the cramping it has gone through.