Prednisone to clear poison ivy severe rash?

Sa

My doctor was awesome today and made me feel like taking topical and oral medicine for the terrible oozing rashes I have is a good decision. Then I go to the pharmacy and the pharmacist made me feel like he was unsure I should be taking it, and now I am a mess. Because I couldn’t live with myself if something happens to my baby, and yet I am dying with this poison rash that isn’t healing on its own. In fact is getting worse. I am an otherwise healthy person, no other issues in my health. Have any of you taken prednisone for 12 days in pregnancy and the baby was okay? I am supposed to start 60 mg for 3 days then drop to 40 and so forth. Thank you so much to anyone who can answer with their experience