Sudden nausea.. anyone else??

Ry

I’m sure it’s nothing and will mention it to my dr tomorrow.. but I’ll be 36 weeks Thursday and I’ve been getting light nausea every time I try to eat the past couple days. I never had morning sickness and have felt great the whole pregnancy. Was this a sign of oncoming labor for anyone? Or maybe it’s just the heat getting to me? I drink at least a gallon of water a day so I don’t think it’s anything I do with dehydration..