I had unprotected sex one Sunday and took plan b the next day. Since then we have had unprotected sex three more times. the second time after the pill we had sex the day I was ovulating. My last period was 12 days ago(August 24th-28th) and I started spotting two days ago. Since then I have been feeling nauseous, very hungry, bloated, constipated and have had heartburn all day. my next period was expected to happen September 17th. I took a test today and it can out negative, I have one more test and I am going to schedule an appointment on Friday to see what is going on. Am I pregnant? should I test again?