Crazy itchy

Rash that started two weeks ago. I thought it was an allergic reaction to Pepcid because that was the ONLY thing that changed in my life. After a week and a half of Benadryl, hydrocortisone cream and not taking the medication, the rash only proceeded to get worse.

It is raised, red, tiny blisters that are completely symmetrical on my body and SO itchy. It started on both my forearms up to my elbows then appeared on my calves and proceeded up to my thighs.

It is now working up the backs of my upper arms and almost completely covering my thighs. It appears gradually a few new ones each day. I’ve seen both primary care and OB with no luck.

No other symptoms, nothing in my life has changed and nobody in my family has it either.