Girls! At 32 weeks, my bones hurt where the pelvic bone connects with …

Girls! At 32 weeks, my bones hurt where the pelvic bone connects with the shin bones or ligaments (I don't know how to write it correctly). I marked it on the photo. ??. The pain is strange, especially when I get out of bed or chair, and then walk. It gets better later, but for two weeks now, it hurts when I sit down and stand up. What could this be? My bones are getting ready for childbirth and spreading a little bit, maybe that's possible? The baby has become more active lately... she started worrying.