“Do I need to see a neurologist?”

Hi, two years ago I was eating and suddenly I had some palpitations went to the hospital they did blood test and there was nothing. A week later I just suddenly felt very bad in my head for like a second like something exploded inside the head, and after that my sleep was disrupted, I lost my sleep habit, I have mood change, I feel sad for not reason I have excessive thoughts and it does not seem to get better.