I think I need to go part time at my job for now

I can't even explain the dread and stomach aches I get when I wake up on a workday. The stress of being overloaded at work is worsening my health issues and causing new ones. Which leads to me needing more time off to recover, which leads my supervisor to say "You're overusing FMLA."

Oh yeah? Well this company is overusing ME. I take triple and sometimes quadruple the amount of calls as everyone else, and that has remained a consistent pattern for months, despite me bringing it to the attention of everyone I can. I have documentation of this fact, and I have documentation of my medical conditions, and I have FMLA because my doctor agrees that my job is often a trigger for my conditions.

It will be less money and no benefits if I go part time, but that's also gonna be less money that gets taken out of my insurance for benefits. And the most important part is that my body and mind can rest more often. This job is literally making me sick.