Am I pregnant!?!?

I'm only 14 years old coming up 15. I am a great student and always do as I'm told to apart from last Monday. I had unprotected sex. I know i should have waited a while but I've been panicking about being pregnant so I did a test. Just to put my mind at ease. My boobs have been extremely sore all day and I can't stop eating. My head really kills. The test showed me a prominent line and a extremely faint one. Does this mean I'm pregnant?