Ahhh tu normal lah at 33 weeks, uterus kamu preparing for labour so Braxton Hicks contractions memang akan frequent! A few of my mum friends said theirs tightened every few minutes especially lepas makan or when tired, tapi if it's painful or ada bleeding, kena check with your doctor ya, otherwise just rest, drink plenty of water, and try to relax sebab stress pun boleh trigger more contractions