12 days delayed menstrual cycle....

Have you taken a pregnancy test yet? If not I would suggest taking one anytime since your almost two weeks late. Make sure you take it in the morning with your first morning pee so the levels are at there strongest. Also lay the test by the toilet the night before so you dont forget and pee then have to wait for the next morning. Walmart has test for 88 cents and the dollar stores sell them also. You dont have to spend a fortune on name brand because the generic work just the same if not better in my opinion.

Not if you have haven't had sperm introduced into your vagina on a fertile day! What was the date of the start of your last period? On what dates since then have you had sexual activity?