Hello, ive been having unprotected sex with my bf, waiting for my period to come to start my birth control , which is new for me. For the last week ive had slight nausea at different times throughout the day, with hot flashes tonight it got much worse and later I ended up with diarrhea as well. now I am having period cramps but so far there hasnt been any blood. This evening I decided to take an hpt which read negative. Does any of this sound like early pregnancy?