I was in the same position as you when I was preg, due for a 12 mobth follow up pap after a previous possible CIN 1. My OB told me we needed to wait until I was out of the first trimester cos he didn't want to cause any bleeding. Then when the time came we decided not to bother and wait until after the preg cos even if another abnormality did come back there is nothing that could be done until after I gave birth and it would only leave me worrying until the end of the preg. He assured me that there was no risk in waiting because the abnormalities take years to progress and also said that preg can give misleading results too. GL