Freaking out.

So I had my first Pap smear done a few weeks ago and the OB office called my back today and said said it was abnormal and had some "aytupical cells". She didn't seemed concerned and said it wasn't r cancerous and it wasn't something to be nervous about but I am freaking out. What could cause this? I am 24 and have had only 2 sexual partners in my life (and I've been with my current for over 7 years). I go in on the 31st for a colposcopy. I'm going to google myself crazy so has anyone else ever had this happen? & what does it mean? Just anything to calm my nerves. Thank u!