Horrible full body rash, how long it is going to take to recover😫

I’m experiencing horrible pregnancy rash which doctor suspect is PUPPS and pregnancy eczema since week 18, has been struggling to sleep every night and the rash have spread from my tummy to my hands and legs. Have previous eczema flare before but didnt last this long. I’m in week 22 already and it’s still itching badly!! Tried suu balm to ease the itch temporarily and doctor prescribed elomet which is not being very effective as of now:( #firstbaby