I started taking Lo Loestrin Fe on March 9th, 2014 & started my period on March 14th and bled exactly for 27 days(4/9/14). Then had intercourse on April 11th & April 22nd. Could I be pregnant? My periods are irregular & I have not had a period since May 2013. I have taken 2 pregnancy test and both are negative. Should I wait to more weeks then retest. Also keep in mind I had sex on the day that I was supposed to start my period.

Since you're irregular, to the point of years, you will need to wait a little longer. The pregnancy test pick up on a hormone that is released when the baby is growing in your womb. There is a certain threshold that needs to be achieved before they'll show positive and that is usually two weeks past the start of your period, or 42 days after the start of your last period assuming the regular cycle. When we CAN'T in your case. So I would wait for about 2-4 more weeks and test every two weeks. Maybe, if you're not wanting to get pregnant, take the time to consider and start birth control.