Ouch sweetie!
I suffer from awful hip pain with every pregnancy, and have thus far avoided it, but it is still early days for me.

I have been taking Blackmores Total Calcium + Magnesium tablets, which my midwife has told me helps with the hip pain, and also for restless legs (which I don't get)

Perhaps try taking some calcium & Magnesium... It seems like you have tried most other things I would have suggested.
I hope the pain lessens for you real soon