It is over a year and a half since my health anxiety journey started. I experienced a huge array of symptoms (at its worse, frequent nausea/vomiting, dizziness, headaches, chest pain, and more) I wanted to post about the things that have helped me recover the most. I still struggle occasionally (for the past few months I have been worrying about my vision and the very rare migraine) but I am 85% recovered, and have in the last year gotten engaged, run in a 5k race, interviewed and taken on a demanding corporate job, gotten a dog, moved, hiked mountains, took up running, lived alone while the fiance was away on business, and gave a speech at my sisters wedding! So here are the things that have helped the most:

1) Just keeping on. This covers a lot - from pulling myself through each new day, to forcing myself to visit with friends, choke down a smoothie, moving past a bad episode or night of insomnia. Even the worst day ends eventually.
2) Exercise - I started small with just walks, little hikes, and then eventually running and biking. I still get nervous about exercise sometimes but when I started to run 3-5 times a week last fall is when I saw the most improvement. I figured my health anxiety was telling me I could drop dead on the couch and I decided I would rather drop dead while running. A few weeks ago I ran in my first 5k road race ever, and completed it without stopping or walking and it felt amazing. I never would have been able to do that a year or even a few years ago - so paradoxically while I am most worried about my health, I am also at my most fit!
3) Staying Busy - I thought about my health anxiety the least when I was occupied with something else. I saw major improvement when I got a new job that kept me much busier than my old job, and challenged me to "act normal" even when I felt panicky or anxious.
4) Two of the most helpful books I read were Hope and Healing for Your Nerves by Claire Weekes (recommended here often) and Duct Tape and Bag Balm by Beach Conger, MD. The second book was a random find at a used bookstore, and are the humorous tales of a country doctor. It has really made me laugh and look at things in a new light, and I highly recommend it! It has helped me think about the medical system and medication in a new way - basically that if you look hard enough at any human body, you will find something to diagnose, but that doesn't mean anything is actually wrong. I really highly recommend finding a copy used, there are some chapters that deal directly with how our medical system creates people with health anxiety - and the solution is to take a step away from endless tests and searching.
5) Stepping away from google and health articles/books. This has been extremely difficult and I still have a hard time with this - as evidenced by the last week or so I spent reading about other people's vision disturbances on NoMorePanic. But when I can take a break for a length of time, I feel much better.
6) A few things that I do that may or may not do anything - I take fish oil supplements and no other medication. I occasionally drink herbal or green tea. I feel better without coffee although I still get caffeine in tea. I have dappled in some herbalism and health food, but mainly just eating enough and drinking water works best. A glass of wine here and there is relaxing.
7) Probably the worst thing I have a hard time getting away from is phone and computer use. I think staring at the computer and phone all day, in and out of work, do cause neck and eye strain that are the source of many of my complaints, even the occasional migraine. But I feel much better on the days when my screen usage is less than a couple hours total.
8) Sex, even masturbation, creates good feelings/relaxation/distraction. No surprise really that I feel better when my fiance and I are intimate more frequently. Although I admit I was often not in the mood for it when I was highly anxious, even just going along with it often helped me feel better and more relaxed.

I hope this helps someone. Its been a tough ride and Im not completely there yet, but it has gotten so much better. I still have nagging worries about my brain/eyes/etc., what is anxiety and what is something more, but I believe recovery is possible.