Pap smear while pregnant or Ttc?

Tiffany
Hi guys....I'm schedule for a pap at the end of the month....I'm kinda a few months late on it and It needs to be done, due to last years having a tiny abnormality...which was taken care of. Anywho, I'm currently ttc....and I'm also on my fertile days this pass week....so I'm having quite a lot of sex (fingers crossed). I'm due for my period before my pap is scheduled so ill obviously test before that....but I was curious.....is it safe to have a pap done if your pregant??? Or what if you don't know your pregant and have it done? Can the doctor tell your pregant by doing one? 
Like I said...I'll have time to test before hand....but just kinda curious about the whole thing.