Pregnant at 17?

Lauren
We had a bit of unprotected sex, like a bit of teasing foreplay, you know? We put the comdom on well before there was any precum, at least I think so. That was Saturday, it's Friday now. On Saturday, glow said I had a 3% risk of pregnancy. Seemed negligible to me! Oh well. Now it is Friday and my period is 2 days late. There was about 2 spots of pink yesterday but it could have been my imagination. On top of all this I'm going to the gynecologist on the 16th to get birth control. Good Job. Shoul I tell the doctor about this? I'm planning to get a IUD. Would getting one terminate a pregnancy? I don't want to buy a pregnancy test or a morning after pill, yikes. what advice do you have?