Im being woken up out of a dead sleep from nausea and having a constant acidy feeling in my throat, like somethings gonna come up but never does. And it lasts for about an hour then I fall back asleep. Then it continues a little bit after I wake up for work and lasts most of my day. Is this a sign of labor coming or am I just getting sick? I haven't had morning sickness at all my entire pregnancy and its weird its this intense.