Hi, My name is Aubree and i am new to this. I stopped taking my birth control called Viorele the first week of december 2012. My period came on Jan 1, 2013 and it lasted 5 days. My cycle is usually 30 days. A week after my period went off i had unprotected sex using the withdrawal method. My next period was suppose to come on on the the 31st of Jan 2013. I am currently 18 days late now. I have taken 7 htp and i went to the health department in my town to do a urine test, they all came out negative. I have not been having any symptoms, everything is normal. Could i be pregnant or could this be because i stopped taking my birth control.