I am a 28-year-old female. I have been having lower back pain and cramps for two days now, but my period is not due until a week and a half away. I have a regular 28-day cycle and I think I ovulated between the 18th and 23rd of this month. I have been having a little bit of upset stomach, but I think if I was pregnant it would be too soon to be having morning sickness. Is it possible to be having symptoms so soon?