OP, I'm very sorry for your loss. I don't think you're being dramatic at all. Losing someone is the most painful thing someone can go through, and it's something you'll always think about. It seems as if your emotions were dulled when your mom passed away and you dissociated to a certain extrent. Now it's hit you and you're truly feeling the pain. Get all of your emotions out and know that what you're feeling is valid.