I agree with the others, I thought of seizures and PTSD also...if it were me I'd get in to see my doctor (medical doc, not pdoc) to rule out any physical conditions. Take care and let us know how you are doing!
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From the movie The Hours: "If I were thinking clearly, Leonard, I would tell you that I wrestle alone in the dark, in the deep dark, and that only I can know. Only I can understand my condition. You live with the threat, you tell me you live with the threat of my extinction. Leonard, I live with it too."