HORRIBLE DIAPER RASH HELP!

My daughter is 18 months.

She wore any brand of diapers until about 6 months. After that, LUVS was all we could use.

She gets diaper rash to the extreme of blistering, bleeding and raw to the point she SCREAMS and writhes in pain!

The doctors have given us prescription cream and it’s worked up until this last time. She’s now had diaper rash for 8 days and we tried organic diapers as per our pediatricians recommendations. I’m starting to worry it’s something more serious! Please help!