Brain Fog

Has anyone else had awful brain fog when symptoms flare up? Had awful symptoms yesterday and missed work today cuz I was sure my shift was tomorrow...

I feel awfully but this just isn't like me at all.. I can barely think and feel like I'm having a panic attack when my heart rate jumps around. Please tell me I'm not alone 😞.

Any advice on what to say to my boss would also be amazing.. Currently thinking I'll just say I'm having medical issues that give me really bad brain fog.