I have my tubes tied and they have ben for 5yrs.my aunt flow has nt came yet hlp me?

ok well last month it came on the 19th and the month b4 that it came on the 23rd as it did previous to that wut could be wrong i have never missed a preiod by the way im 27yrs and i just got married and we have not used any protection at all pls help me wut could be wrong with me