I’m really scared but trying to stay calm

Are nerve issues related to anxiety? It’s hard to believe my body can manifest these actual physical symptoms. My nerves are firing all over my body, burning and tingling/buzzing sensations. Sometimes my hands and feet go numb. Occasionally there are some really painful zaps.. severe dizziness too. I do have health anxiety, but I also had a major surgery in April (elective tummy tuck) so I’m very afraid that I’m having complications. I’ve been to the ER, my primary care, an ENT. I’ve had blood work, CT of my head, XRay of my cervical spine. So far everything has come back normal. I also had severe acid reflux and was diagnosed with GERD. Which my surgeon said can sometimes be a complication of the tummy tuck but is transient. I have a neurologist appt in 3 weeks. Sorry for rambling. Just nervous.