Does anyone else have anxiety problems because of head trauma?

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I fell off of a bicycle about 10 years ago. Almost died. If I had bled in instead of out I would have died I was in a coma for 3 days because of it. Anyway, I have some anxiety because of it, which is apparently common, but, I have developed a caffeine sensitivity I think because of it. My coworker today got me a coffee, very nice of her, but I asked for decaf because I know I am sensitive. They gave her a regular which I drank right down thinking it was decaf. I spent the rest of the day at work on the verge of a panic attack because of it. Has anyone else experienced this? It isn't the first time but it might have been the worst