Mama, I know it's scary, lalo na ang sharp pain, pero please don't wait, call your OB or go to the hospital right away, kahit walang blood or spotting pa. At 36+ weeks, kailangan talaga ng proper check-up para ma-rule out kung ano talaga ang nangyayari, hindi lang assumption na okay lang kahit mauwian ka. Sharp pains need to be checked, alam mo yan.
One of my mum friends had similar pain at late pregnancy at nag-worry din siya, pero the docs needed to assess her properly para ma-confirm if it was just ligament stretching or something else, kaya hindi ka dapat mag-assume based sa iba. Your baby's active, na which is good, pero that doesn't mean the pain is nothing. Go na, mama, better safe than sorry, especially ngayon na malapit na ang due date mo.