Hii Im Two Weeks Late But Whenever I Had Sex

Hii im two weeks late but whenever i had sex wid my husbnd i feel more then normal all the sperm is cuming out like never before... why?? Nd i have pcos nd was taking medications from past 3 month last mnth my period wad early nd dis month no period.. nd even no pregnency symptoms.. but i just had a low grade fever wid fullof bodypain on de first day of my missed period.. please help.. i testedon 7dayof missed period but the test came out negative ...