4 weeks post-op my doc put me on a presc. cream. I used it w/ a new bra made of synthetic fibers & it gave me a rash. (photo)

the receptionist said to change my bra, and stop the cream. I have applied hydrocortizone cream twice a day for 7 days, but its still there (although much less severe), itching, and now the skin is peeling! Now The surgeon said I shouldn't stop the prescription cream, he thinks it was the bra but I'm afraid im allergic to the prescription cream, and the hydrocortisone is drying me out. should I start the prescription and maybe it will stop the peeling? Pix are from today 7 days from breakout