Hindi ka nag-iisa sa worry na yan, mamsh! A few of us moms went through the same thing, every pregnancy is really different, and yung size ng belly doesn't always mean something's wrong, especially kung okay ang baby sa last ultrasound mo. Since your check-up is coming up sa Jan 30, definitely mention it to your doctor so makakatulog ka ng mahimbing, but honestly, maraming factors ang nag-affect like kung first time pregnancy ka, body composition, at kung saan positioned ang baby, so don't stress too much comparing with other moms!