I have hypermobility syndrome and have to take it for my hips every now and then. However, when I was pregnant last time, I had severe SPD & SJD and the consultant prescribed it to me. I had tp take it every day just to be able to get out of bed in a morning, but as I took it so frequentlyI had to be weaned off around 35 weeks so baby wasnt born with withdrawals. As the pain killers reduced, the pain obviously increased and I was induced at 38 weeks.
I really feel for you if you cant have anything stronger.
Order yourself a belt called Wiltshire Belt, its designed to go around the hips rather than a bump & back support and it helps keep your pelvis sturdy. I already had to start wearing mine for a couple of days last week after hoovering and mopping and a dog walk done me in x