Pregnancy after Tubal?

OK here it goes I just turned 41...I had a tubal done in June of 2006 after my son was born..my periods are very regular but I have just missed my Sept. cycle and now it is the first week of Oct. and still no period..is this normal or could I be pregnant after tubal??(wich is scary)..or maybe just menopause lol please help me if u can