Pelvic pain

Hi everyone,
I'm now 12 weeks pregnant with my second baby and I'm really struggling with my pelvis. Especially after a day at work, I'm completely exhausted! With my first pregnancy, I didn't have this until the end.
Are there other ladies who experience this too? How did you manage it? There doesn't seem to be much understanding, and I feel like I'm just making it up. I'd really like to enjoy this pregnancy instead...