In my 12 weeks

I had this feeling too, but I can't remember when I started experiencing it. For me it was especially more pronounced in the evening after a heavy meal and it felt like i just gave my stomach muscle a stretch after doing sit-ups.

Yes & it's called ligament round pain. Comes & goes but is not painful. Very common in pregnancy cos your uterus is stretching to accomodate to your growing baby. Will go on till the 3rd trimester.