Help!!

I got a letter in the mail today regarding the Pap smear I had two weeks ago. It said the results are abnormal. I called the gyn and made an appointment to go talk to them Wednesday morning. Have any of y'all ever had an abnormal test? What could it mean? My boyfriend and I had sex the night before.. could that be the reason it came back abnormal? I'm trying not to freak out about it until I have a concrete reason from the doctor to freak out...