Period ?

So I missed my period 4 Feb (NOT normal) took a pregnancy test it was negative two days later took another one with a VFP & took 1 more which was neg so I quit testing. Well now march is coming 2 an end && still no period, if I missed my period for Feb (I've never missed a period except when I was pregnant my 1st time) then when should I get my period again? Not on any type of birth control, never have been & I don't nor have I ever breast fed..? Any ideas ?