Braxton hicks? Or something else...

Adriana • 21| Married to David| mama to David Jr & Gracie this November♡
I have been noticing when I walk or if I'm just sitting my lady friend down stairs starts to hurt like if I sprained it or something...but im talking about an acheing feeling like if i just had the most amazing night with hubby (but sadly havent since i dont feel right about this)...I have mentioned it to my Dr and he said it's normal but idk I didn't feel this with my son..I'm 28 weeks today and nothing is helping me get comfortable...might be tmi but when I try to stand up my legs are like so widely opened and that's the only way it doesn't hurt..and then it still starts to hurt while not even taking a step.... I'm wondering should I be worried or is it normal..