If I were you, I'd definitely be seeing a doctor. All you can get here are "ideas." A doctor can give you the real low-down.
There's no need to be embarrassed. It's not something you did to yourself, and even if it was, that's what doctors are for; to help us take care of ourselves. It COULD be depression, but then again, it could be something else.
I'm encouraging you to please see a doctor ASAP.
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.