Sis, any pain sa pregnancy needs a proper check from your doctor, lalo na ngayon pa lang kayo sa 5 weeks, kaya better see her soon to make sure everything's okay.
Hindi ko kaya mag-say kung normal yan or not kasi talaga, doctor lang ang makakapag-assess ng situation mo directly. But a few of us mums noticed na iba-iba talaga ang body response sa early pregnancy, some had cramping, some didn't, kaya walang one-size-fits-all dito.
Kahit slight lang ang pain, better safe than sorry sa pregnancy, so book that appointment na, love! Sending you strength.