Air bubbles?!?

This is pretty embarrassing, so I thought I'd ask here first before my dr. Apt tomorrow. So I'm 5 weeks pp, this is my second baby, everything was normal. Now I've noticed that I have these air bubble feelings just escape out of my vagina. It's not like a full on queef haha! But is such an odd feeling and I hate it. It's like a trapped bubble that if I move around or walk it just escapes out. Is this normal? Or do I need to just grit my teeth and ask this embarrassing question? It's like once a day ugh