Well, if you want the pregnancy, definitely stop taking them. Women with high testosterone levels have been studied in regard to pregnancy because high testosterone levels are a feature of PCOS. The outcomes seem to be that the risk of miscarriage is higher and the risk of low-birthweight babies is higher. But nothing I've seen says taking this for one single day will cause you to miscarry.
Please talk to your ob-gyn, but stop taking the prohormones if you want to protect the pregnancy. Good luck.