Ok my periods are irregullar always usually between 30 - 34 my last period was dec 6th and they usually last 7 days so to day is jan 3rd and the past 3 days I feel cramps and my niplles are really swollen. Im thinking that I can be pregnant cuz I had un protected sex this month 4 times. I took a test this morin (twise)and it was negative but I still think I am. Pleasse help >>>>>>>>>>&g t;>>>>>>>