VAGUS NERVE OR GERD? Who came first?

At some point during a very horrible anxiety/fear episode something got messed up. I remember trying this new meditation to see if it helped and it was driving me insane. I stopped eating, sleeping, I couldn't think clearly, I was clumsy, well you name it. I had to stop after only 7 days. Long story short, now I'm barely eating, my symptoms are horrible, palpitations, chest pain, pulling sensation in my troath, hard to breath and many others. I don't want to do a long post so. My question is, is my Gerd/Gut problems messing up with my vagus nerve or is my vagus nerve messing with my gut?

What should I fix first? Which one should be my priority? My GERD?, MY VAGUS NERVE?

I have a very small hetial hernia that the doctor in the hospital didn't even seem to care, In the notes also says I have severe GERD which he never even mentioned to me... Still waiting on biopsy and more. Have some more testing to do. Medications for gut are not working and I feel this very weird feeling in my chest and whole body like there's something running all the time.

What should I do? Who came first? Any advice?