I am supposed to get my cycle the 14th of Sept. I had sex several times during my ovulation(Aug 25-Sept 1). I have had random queasy moments and random heat flashes and a stuffy nose when I lay down at night. I am having lower back pain too but idk if it is from my period being next week or not. Periods and early pregnancy have some of the same symptoms. I took a pregnancy test Monday and it was negative. And I honestly I couldn't tell I was pregnant with my first 2 until I was 5 months so idk what to even look for. HELP, when would be a good time to take a test again.