I do think Sparky has a point. Take a deep breath and see how things evolve. It may have just been one of those weird anomalous days where several things go awry at the same time. Try not to panic about it yet, but rather, communicate your concerns and see how things transpire.

My husband has a neurological condition that increases/decreases in pain level. It won't kill him and it rarely affects his ability to work. When his pain is severe, it does occasionally affect his focus and memory some (severe pain can do that), so perhaps that was what was going on. Why not ask him about his illness? Not details, but simply frame it as an inquiry about whether his medical condition affects his attendance to work, memory, focus, etc.