Is throwing up a sign of labor?

Thursday I started losing my mucus plug and I also threw up that morning and had strong cramping and contractions all day.  Since then I've been having more and my appetite is almost gone... I also threw up again this morning but don't feel sick. The dr. Said today at my 36 week check it was normal and I'm only a "fingertip" dilated.... I'm hoping this means baby is coming sooner than later but I guess you never know! Did anyone else throw up before going into labor?