I've been counting my periods to try to get pregnant!

I've written down my last menses so I can try to get pregnant. However, as it seems that my cycle is irregular, I need you to help me try this month again. My last dates are: 16/11/2011 12/12/2011 14/01/2012 11/02/2012 14/03/2012 Thank you and I await your return.
Expert answer:

Your cycles range from 26 to 33 days. This means that the 15 th day of your cycle is your most likely fertile day (03-23-12), count 4 days before and 3 days later and this is your fertile period, relations on those days have more likely to become pregnant.