I had it very bad when preg with DS1 I wore a support belt from 26 weeks and was seeing physio weekly, and iceing it regularly as possible, but couldn't do it really on work days.
I really noticed difference if I didnt wear belt, I couldn't walk around at work.

To be honestly physio sessions felt good at the time but give it 4 hrs and it was same again.

When preg with DS2 I started very early on getting up correctly and sleeping with pillow between legs. It actually was more painful early on in preg and eased in last 4 - 6 weeks. I did have many nights of crying in pain as I couldn't move without feeling like my pelvis was going to split. OUCH