Am i pregnant? ? Is it too soon to test?

My period started May16-20,2011 .. I had sex unprotected in hopes of conceiving on May 21,2011 . A few days later I experienced some bleeding between the 29-31 , it was light pink at first the brownish. . Today is now the end of May 14 and I have yet to start my period making me a day late =} … My left breast has been sore(only the nipple) as well as headaches. . Maybe its wishful thinking but I'm hopeful. .