GETTING OF YAZ AFTER 7 YEARS ----THE AFTERMATH--PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!

Hi... so I have been on YAZ birth control for 7 YEARS. I just recently got off it this past OCTOBER 2010... I did NOT have my period at ALL in November. However, I did receive my period (or what seemed like it was my 5 day normal period)...on December 5th and---precisely on January 5th-BUT now I have not received my period in February and I am now 12 days late... I took THREE HPTS (just to be sure) and they all came back NEGATIVE... I kind of have symptoms of having my period bloating, breast pain etc... I am just wondering if it is normal to have two regular periods and one irregular after stopping the pill??? I am very confused.. ANY ADVICE?!?!?! thanks :)))