I do too can't find an explanation really but someone said it's just stretching
U can get growing pains which I.had with my first but they were by the pubic line/ bone
Look up SPD. Its what I have a lot of girls get this. Its pubic bone pain and hip pain my doctor recommended a support belt to take pressure off that area
After 20 weeks (Sometimes sooner) women will experience Braxton hicks contractions. That's probably what you are feeling. Probably just ligament pain you feel
Okay ladies the pain is caused by growing baby pressing on nerves in the pelvis area in addition to the stretching of ligaments.