i have a period tracker and my period has always came when it was supposed to come well this month I missed my period I did have unprotected sex also but I had taken a pregnancy test I bought from the dollar tree and it came out positive so then later that night I bought a better brand to check again I bought the clear blue and it came out negative so I would think clear blue would be true because it's a better brand but can you have a false positive but if I'm not pregnant why would I miss my period I've gained weight recently, could wait affect my hormones and make me miss my period? But I still don't understand why one test came up positive could I be pregnant or would the clear blue be right and I'm not? Help?!