Just feel ‘off’ today. Does it mean anything or...?

I’m 37 weeks today and although his is my seventh baby, I don’t ever remember having this feeling before. It’s like, I’m hungry but the thought of eating makes me want to be sick. I haven’t eaten an actual meal in 2 whole days, just small snacks like 1/2 an apple here and there. Idk, it’s really hard to explain! Like im kinda acid reflux-y, kinda gassy like i feel like im going to burp but I don’t. For two days now, I’ve had the thing where you throw up in your mouth a little bit, but only a couple times and it happens for no reason at all. Of course I’m exhausted and uncomfortable otherwise, I know that’s completely normal. But what about this strange sick like feeling? Is it normal? Could it be a sign of labor being near that I’ve just never experienced before? Could I be coming down with something? Any input is appreciated. Thanks ladies 😊