Hi I am 21 and I am wondering if there is a chance that I am pregnant. I am on the pill for 2 and a half years. I had my period on the 6th of November and it ended on the 11th. I skipped a pil on the 12th of November 2012 and took two pills on the 13th.  Me and my husband had sex on the 15th of November. We are not trying to have a baby so while we were having sex, I realised that I missed a pill , and then we stopped about 2 min after we started. He did not ejaculate in me. After that I waited till the day my period is due, that was the 27th of November. We did a home pregnancy test on the 27th and the result was negative. My period arrived a day late on the 28th and only lasted 4 days. My normal period last about 6-7 days. In the last 2 weeks I experienced some breast tenderness evry now and again. Then yesterday on the 16th of December I started showing bright red spotting and then turned brown spotting and is still showing some today. I did another test today and also turned out negative? Is there a chance that the spotting is a pregnancy symptom?