Sex fart

Sandra • Wife 👰🏾👨‍👩‍👦 Mother to Ava love 3/29/18 👶🏾 Baby #2 🤰🏾😍🎀 6/30/20 🍼 👶🏾 RN BSN 💉💊👩🏾‍⚕️
I haven't experienced that in a hole but when I started dating my fiancé I use to pass some strange gas from my vagina every time we have sex. No odor jus strange sound and it get worse when my legs are up or doggie style. Has anyone had this problem and what is that? Do I have that much air in my uterus or something?