ok weird/stupid question. its been 5 years since i last had a baby and i no every pregnancy is…

ok weird/stupid question. its been 5 years since i last had a baby and i no every pregnancy is different. i will be 38 weeks pregnant wednesday. no matter how much i sleep im still exhausted. and im starving all the time. could this be a sign my body is getting ready for labor? or just another part of pregnancy?