If you are just coming off the pill, it's possible that these symptoms could be the effects of that.
Or you could be pregnant as well. The only way to find out is to take an pregnancy test once you've missed your period. The pull-out method is not an effective way of preventing pregnancy and you can get pregnant even if you think you played it safe and he didn't ejaculate, or release "cum"....it's too hard to tell if he has or hasn't actually done that.
If you have normal length cycles, you could get a valid reading at this time.