Sayang, at 38 weeks with tightening every 20 minutes, you really should call your doctor or go to the hospital to get checked out, even though baby's movements are good, they need to make sure everything is okay, okay? Better safe than sorry at this stage. A few of my mum friends thought it was just practice contractions jugak, but their doctors still wanted to monitor, so just go lah, takde harm in checking! Keep an eye on baby's movements while you're getting ready to go, and if anything changes, don't wait, go straight to the hospital. Praying everything is smooth for you, mama!