Some women have morning sickness once the embryo has it implanted itself in the uterus. Which about the time you are now. But keep in mind it could be something. Remember, if you don't have your period or if it is a light one not your usual and you think you may be pregnant, wait a week after you were suppose to start your period then do a pregnant test. If you do one to soon you will get a false-positive reading. Also check it first thing in the morning.