"I'm so fat I have blisters where my crotch rubs against my stomach: despite this I refuse to lose weight and talk of doing so is fatphobia."

I’m so horribly embarrassed. Two blisters have formed on my belly fold right at my mons pubis. One on my belly and the other actually in my pubic hair. There’s no rash or redness, only the two blisters. Googling has told me that it’s either a heat rash or intertrigo. I’m recovering from an eating disorder and “weight loss” being a treatment for both has me in tears rn which is so silly. I’m just looking for support and advice on how to avoid blisters from belly fold. Tell me it’s a normal body thing please