I ovulated the 5th of November and was fertile the 1st-6th of November. I know because I have an app that calculates it... We didn't use a condom and I'm not on birth control. I took a pregnancy test Saturday the 15th and it said negative. But I have been experiencing nausea that lasts almost all day, headaches, fatigue, and my stomach just feels tight. Also, my boobs are VERY sore and they're never like that. I took another test Tuesday the 18th and it was negative but it also looked like it had a faint line on the positive side.. I was supposed to start my period the 18th or 19th. Should I take one in the morning or wait longer??? Also, what are your opinions. Do you think I'm pregnant. ?? Thanks in advance!!