Hello, It is true that steroid or in fact, any drug usage is viewed with precaution during pregnancy, especially during the stage of organogenesis,i.e., the stage when organs are formed. So your obstetrician is justified in asking you to stop the drug because even in topical application, some absorption occurs and that could be unwanted at this stage. I suggest that you consult your dermatologist again and see if you can use something safe in pregnancy. Also, try some preventive measures like avoiding stress, avoiding hot water and taking lukewarm showers, using gentle cleansers and frequent moisturizing and also avoiding triggering factors. Take care.