I had it during PG and for months afterwards. Pilates has helped me lots as a good strong pelvic floor and stomach muscles will support and keep the joints stable.
When I was at my worst I couldn't walk and one day I had to go down the passage to get a towel for a shower. I encountered a tonka truck in the passage and I couldn't step over it or could I bend over and pick it up. I really hurt myself reaching around in the car to pick up a toy for Angus. Just a little twist and I was agony.

It is it tedious sometimes remembering to always keep your hips even and never get up from the floor in a kneeling position, especially if you're in a hurry to do stuff but the alternative is sometimes weeks of pain

Besides a physio you could also try a chiropractor but do your reseach there before you subject your body as sme can be too rough. Ask for reccommendations. Not sure where you are but if it's Melb then I can tell you mine as he's brilliant.