Oo, normal lang yan sa ganitong stage ng pregnancy, mama! Ang left side pain ay madalas dahil sa ligament stretching at kung paano ang baby ay nakaposisyon, a few of us felt the same thing around 36 weeks kaya don't worry. But since you're this far along, better check with your OB pa lang to be sure it's nothing serious, lalo na kung intense yung pain o may ibang symptoms.