Totally normal at week 33, your uterus has grown so big it's pressing on your intestines, which slows everything down and causes all that gurgling, gas, and burping. My friend who just delivered her second said the same thing happened to her in the third trimester and her gynae told her it's just the digestive system getting squished and sluggish, nothing to worry about. Eating smaller, more frequent meals instead of three big ones can help reduce the gassy feeling. That said, do flag it to your gynae or midwife at your next visit just to be sure, especially since you're a FTM, always better to hear it directly from your own doctor.