Hello am just worry if i could be pregnant because i a a normal in my cycle so i wanted to because on october i got ma menstrual on the 22 then on november it was behind a week and i got in the 28 and only for a day and now dat we are at dec.31 i only have cramps for 3 days but hsvent gotten my oeriod I took a pregnacy test on the 30 and it came negative can some one help me