Hey mama! At 7 months, yan usually normal, a lot of us experience that pulling or aching feeling pag bigla kang tumayo dahil sa weight ng belly at how your ligaments are stretching, lalo na if you've been lying down. Pero since tolerable lang naman and walang bleeding or severe cramping, it's probably just your body adjusting, pero I'd still mention it sa OB mo just to be sure, especially if it gets worse or mas masakit na next time. Take it slow pag tumayo, sit up first bago mag-stand, and rest as much as you can! Kaya mo yan, mommy!