Your symptoms and their sequence are very similar to my husband's. He had ocular symptoms for a couple years. His eye doctor knew enough to run the first blood tests, but when they were negative he let it go and so did my husband. Two years later he got a bad case of bronchitis; he was given azithromycin and levaquin, stopped swallowing and ultimately went into crisis. We learned, and he improved greatly just as you have.
I don't write this to scare anyone. Stronger advocacy and better understanding on our part would have helped us get on the upward path more quickly. That's what we are here for. Learn more by reading GOOD sources.
Finally, talk to those who care about you. They probably cannot see everything you feel, but want to help. That includes your local medical team. There is never anything wrong with improving your diet or incorporating a little wise exercise on your own, but establishing a really strong relationship with your doctor and pharmacist can be invaluable.
And remember, we are all for you too. Juliana (Myasthenia-gravis.com team member.)