I was pretty diagnosed the day i went to the hospital with double vision. I had never heard of MG but the symptoms, besides the double vision, the difficulty chewing, which i had thought was just un-related, well not to the doctor. He put me on that pyr drug and 2 hours later my double vision went away. The actual diagnosis came from a blood test 2 weeks later, but it was pretty much a done deal. And I highly doubt any short term delay would drastically effect your treatment. MG, at least for me took months to come on full force, at first it was just an annoyance, but it progressively got worst as months went by until I could barely speak and pretty much could not swallow liquids or solids. The entire time i was ramping up on prednisone but the more I took the worst it got (just MG kicking into gear faster than the prednisone could slow it). What turned the tide for me was the IVIG treatments. After those started, I am definitely weaker than i used to be, climbing stairs gets me out of breath, i'm definitely not hiking 4k peaks any more, but I can talk, and eat and drink normally again. As long as i don't do strenuous activity, i'm pretty normal, just a weaker and far more out of shape person than i used to be. When/if you get to the point of choking trying to swallow pudding, and can't talk for more than 30 seconds before you can't speak.... Getting back to speaking and eating normally, is a blessing. Hopefully if you start getting worst, you can get scheduled for IV treatments before it gets as bad as it did for me. But at the same time it makes you realize, that even if i'm not 100% of where I was a year ago, i'm 90% better than were i was.