I am 41 years old, delayed menstruation, can I be pregnant?

Good morning I would like to know what is happening because on 04/08/2011 and on 20/08/2011 I was menstruated and on 05/09/2011 I had a relationship, can I be pregnant? Because until 21/09/2011 my menstruation does not fall yet I am 41 years old and I can not take contraceptives
Expert answer:

Every time a woman of childbearing age has unprotected intercourse and her menstruation delays (or gets messy) the first mistrust is pregnancy; you only have to take the pregnancy test to find out if you are pregnant or not.