Here's my situation
May 31, 2011 had intercourse but used withdrawal method which is our only form of prevention. I was suppose to have my period somewhere between June 7th - June 10th. I find now that my breasts are extremely tender and I'm currently experiencing random very light brown spotting. I took one pregnancy test that read negative but I suspect it's too early for the test to show anything. I'm extremely worried about the spotting and tender breasts. What are the chances I could be pregnant?