No nausea....... Until now

I'm about 37.5 weeks pregnant. I never experienced nausea during my pregnancy until today and it's been terrible. I tried to enjoy the sunshine and walk around the farmers market with my SO but the whole time I just kept feeling sicker and sicker and eventually I was like "we gotta go." I tried to eat some food thinking it would make me feel better but I couldn't eat and by then my nausea was accompanied by waves of pain every 8-10min. So we rushed home and called the on-call dr. He said to kick up my feet and rest, stay hydrated and out of the sun and to stick with bland food. He also said if my pain continues for the next 24hrs or gets worse that I should be seen ASAP as they may be pre-labor contractions. I know at this point (or any point for that matter) that  baby can come at any time and I'm kind of freakin out at the thought of going into labor. Also because I feel like nothing is ready at home and we haven't packed our hospital bag! Luckily we installed our car seat though. But best believe that as soon as I can, I'm going to pack that bag!