Messed up menstrual cycle!

Hello,

So my last sexual encounter was in september ( 10-14th sep ). I took two norvelo 1.5mg pills during that time because the condoms broke on two occasions :/. On the 27th september i started a normal 3 day period. Then i didnt have my period in october. I had them on the 2nd of november and again it was a normal 3 day period. Now it is the 2nd of december and i'm extremely anxious. Has my cycle been messed up because of the morning after pills? I know this is a crazy question to ask after having 2 periods since my last sexual encounter but could I be pregnant?