I recently started my period on the 18th October 2012 and it only lasted till the 20th October, I was due to start ovulating on the 28th and I had unprotected sex on the 26th October, my boyfriend did up me (sorry for too much info.). It is now the 31st October and for the past five days I have been feeling sick. Is there a chance I could be pregnant or when could I take a test... thanks in advance