Ok so during my ovulation week i had unprotected sex but on my ovulation day i got a bad cold and had to take prednisone for 3 days. My period was supposed to arrive on 9/15 but is still not here but i have been nauseous all week and getting pretty bad cramps, could this be from the prednisone or should i be more worried about possibly being pregnant? Has anyone else had this issue concerning prednisone? And if so should i go see a doctor or wait it out? I took a preg test yesterday and it came back negative though so im a little confused as to what i should be more concerned with