I have been asked to travel (short haul flight) with work in the next few weeks. I will be 13 weeks by then but have not told my manager yet that I am pregnant. I plan to tell her next week. But I am also anxious about flying due to previous miscarriage after a flight (I know this is probably irrational but I now link flying to miscarriage and would never forgive myself if something happened after I travel, even though it most likely won't have been caused by flying). Do you think it is acceptable to tell my manager I would prefer not to fly now? There is no other transport I can take (different country).