Worth seeing a physio as they will help with some tips but also manipulations to make sure your spine/hips are correctly aligned, as well as stretches, etc to ease the pain. Bad enough and it gets called SPD synthesis pubis disfunction OR Pelvic joint laxity.

I'm 25 weeks now and overdid it there for a few weeks and it got really bad. Cut back on my hours at work, started to rest flat on my back every day, and guess what, it's feeling better than it did. Don't push through the pain, you can end up on crutches/in a wheelchair if you push it too far!!!!