It’s normal! Poor posture and more sedentary lifestyle will contribute to this. cos due to the weight of baby sometimes we end up using other parts of our pelvic area to support.
I had pelvic pain in my 2nd trimester, and also rly hurt when i get up from bed or whenever i walk.
It went away after I started being more active - taking more walks and making it a habit (e.g. evening stroll) since all these build strength and muscle, and corrects posture and it cushions your pelvic bones more. Try doing more stretches too.