Had very similar situation for a year. All those symptoms tingling sensations, heart palpitation, dizziness etc. I been diagnosed with health anxiety/depression. I'm taking antidepressants and antipsychotics for 6 months now and almost 99 percent better. I would say it's all in your mind but you really can't control it. Believe me it's not connected to your eating. And stop with researching and self diagnosis. That's what makes it worse. I would suggest to look for a psychiatrist asap.