Hi everyone! My LMP was July 23 2010 I am not due for my next menstrual until Aug 20 2010 but had unprotected sex during my fertile days and on ovulation day I am having light menstrual like cramps and my breast are kind of sore could that be that I may be pregnant and when shoud I test if so

It may be due to pregnancy, or it may be due to your upcoming period.

See what happens when your period is due. If it doesn't show on the 20th, wait several more days to see if it is just late. Test if need be.