Extreme Sciatica Pain

I'm 19 weeks in and I've had sciatica prior to becoming pregnant due to a back injury from my first deployment, but it had subsided and it didn't bother me for a few months when I had first gotten pregnant. Out of no where for the past 2 weeks the pain has come back and it's worse than I've ever felt it before!! The pain runs down my right side behind my butt, down my thigh, down my calf (it's searing pain here), and it's also causing pain, numbing and tingling in my foot. My right leg is weak when I stand now.

It's gotten to the point I've been to the ER twice within these last 2 weeks cause it's been unbearable, they couldn't do much but gave me a safe dose of morphine to take the edge off. I've tried to exhaust everything I can do to alleviate the pain in these 2 weeks as well. I've stretched, done hot and cold treatments, I've gone to my chiropractor twice and did acupuncture as well, I have yet to do a pregnancy massage but I feel it won't do anything cause nothing seems to be working! ): I've been bedridden the past 2 days because I can only get up to use the restroom to do my business and shower where the hot water doesn't do much relief for me. Getting up to make food is a struggle as well. It's hard for me to roll over in bed and just get up in general.

Also I've recently started to hear bones (?) rubbing against each other when I lift my lower back to move in bed. I find it painful to lay in every position, but it hurts less on my back.

I don't know what to do anymore, I still have a ways to go til I pop my little one out, but I'm desperate and I've started to feel sad over not being able to do anything, but lay down and cry when the pain becomes unbearable. I'm tired of feeling this pain and losing sleep over it. ):