Am I pregnant?

Me and my husband had sex on 21 of November my last period started on November 6 and ended on the 13th, I am a 28 day cycle so my period lasts about 7-8 days, Today I am 9-10 days late, I did take a pregnancy test it came out negative. The problems I've been having with my body is bad headaches, really tired, gassy, dizzy, overheated, right now I have been recently sick (bad sore throat and coughing up mucus, and stuffy nose) been about 2-3 days now and I don't know if this means anything but I've been slobbering the entire time I was sleeping last night and that never happens.