From the nhs website (the only one I read when it comes to what to eat in pregnancy etc)
"There is no clear evidence that it has any harmful effects on an unborn baby. However, as with any medicine taken during pregnancy, use paracetamol at the lowest effective dose for the shortest possible time."
I try to avoid all meds now I'm pregnant. But i take one or two doses of paracetamol for a headache without worrying. If there comes a time I want to max out on the allowed dose for several days in a row then I'd call the gp to check before I did it.