Hello GiveMeHope, welcome to Psych Central.
It could be many things, either a mental health issue or there could be a physical reason for it such as hormones for example. We can't diagnose on the internet but you might like to try these online tests and then print out the results for your doctor >>>>
The Sanity Score - Test Your Mental Wellness and
Psychological Tests and Quizzes Please see your doctor.
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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