is paracetamol safe?

Lois
I'm having a minor op done in 2 weeks time. I will be 6.5 weeks by then but my surgeon told me to take paracetamol for the pain after woods but he said this berore knowing I was pregnant. 
Obviously I shall I ask him again when I next go but does anyone know if it's ok to take pain killers when pregnant? 
Thanks :) xx