I've had a pap smear during PG. My Dr told me it's safe but they don't do the part that enters the cervix with the brush, only the external scrape part.

They shouldn't be uncomfortable. My advice to you is to maybe try a different Dr. I've only had one pap smear that was painful and that was done by a Dr I had never seen before and I never went back to him. I've since found a female Dr who is very gentle and I didn't feel it.

You'll cope fine once your in labour!