when to take a pregnancy test

hello my name is selma, my last period Was on October 22nd and I have 31 days cycle. my menstrual cycle That last 7 days. after the 22nd of October I still have not gotten my menstrual cycle. my boyfriend and I had sex on the 20th of November without protection and he came inside me. could I be pregnant and when can I test?

[Elaine Brown, MD]

Hi!
There is always a possibility of pregnancy.  If you have missed a period already, you can do a pregnancy test any time.  Most tests will turn positive at the time of the missed period.
Good luck!
Dr B