accutane/pregnancy

i’m currently on accutane. my period is 2 weeks late currently. it is said that accutane can chase a delay in periods so i’m assuming its that bc i have not been sexually active in 8 months up until yesterday. i hooked up with my ex unexpectedly. we did not use protection however he pulled out way before he came. i blew him the rest of the way. is there a chance i could become pregnant?