Anyone else get hit hard by mid-afternoon slump?

[incircles]

I'll feel 100% throughout the entire day until sometime between 3 and 5, then it's dizziness and headaches again until evening. On days when I somehow avoid a mid-afternoon slump, I have no symptoms.

I'm curious if anyone else experiences this.

[Fogbrain]

Yes, although my slump is defined as cognitive fog and incoordination. Then some days I have no slump and am functional through the day.

Very little predictability in my case as to what day I'll get hit by this.