I'm sorry that happened to you, that's truly dreadful. Have you tried asking your Doctor? Brain injury can cause all sorts of problems depending on the area of injury. For example, a frontal injury can lead to personality changes or epilepsy, it really depends where it was. Ask your Doctor, I'm sure he would be happy to help you.
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Pegasus
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“Everybody is a genius. But if you judge a fish by it's ability to climb a tree, it will live it's whole life believing that it is stupid.” - Albert Einstein