Has anyone ever taken sick leave for Hashimoto's?

I feel exhausted, overwhelmed. I feel like I need a life reset, and juggling a high-intensity job feels impossible. I feel I need time out but it's hard to justify taking time off, it's not like I have cancer or anything. I feel guilty even asking for it, andI'm worried people will judge me for being lazy if I have no "visible" symptoms and if it's "not that bad". Did anyone ever apply for medical leave? Advice needed, thanks!