This is a terrible time to get a new diagnosis, both because of COVID-19 and because you are pregnant. Sorry for your suffering. We are all very sympathetic. It is rare for Grover's to affect arms and legs - it is usually, but not always, limited to trunk. It's not possible at this time to get more diagnostic work done, but it might be helpful to pay attention to posts of people with other forms of atopic dermatoses, sometimes referred to as AD. Grover's, otherwise known as transient acantholytic dermatosis, usually lasts 6-12 months in people for whom it is truly "transient." There are people in this group who have had it for a couple of months to several years. There are also forms of AD that affect people only in pregnancy. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2763729/. The advice you get from the many previous posts hopefully will help. People generously share what worked for them and what didn't, because doctors have little to offer. For any advice you take you'll have to be careful to research safety in pregnancy.