Aww sayang, cyst during pregnancy memang boleh keluar and disappear macam tu je, hormones pregnancy kan banyak berubah. A few of my mum friends jugak kena sama, and most of the time dokter chill je because banyak yang resolve on their own after labour. But since you're at 24 weeks, best thing is to follow up with your OB at your next appointment and ask specifically about this, whether they want to monitor it atau just leave it, because setiap case lain-lain. Don't stress too much for now, tapi definitely don't ignore it either, okay?