Question ?

So I am 3 days away from period. I have diarrhea this morning and nauseas. I have had some cramping since ovulation and my boobs are a little sore. I have never had anything like this before my periods ever. I usually cramp the day of my period. The nauseas has been off an on for the last week maybe longer. What could this be? Have any of you experience anything like this or close to it?