Hi, and welcome! I certainly do understand the anxiety. My antibodies blood test came back negative (three times), but I was diagnosed with MG on the basis of a single-fiber EMG (SFEMG). If your blood test comes back positive, you have a firm diagnosis of MG. But if it comes back negative, that doesn't mean you don't have MG. The next step should be to send you to a neurologist who specializes in neuromuscular diseases, because SFEMG testing is a specialized skill.

Hypokalemia means low levels of potassium in your blood. Did anyone suggest what might be causing it? You say you have high blood pressure--are you on a diuretic for it (like HCTZ)? Low potassium can make MG symptoms much worse. Is this being followed up? If it's just the HCTZ, you might be able to fix the problem by making sure you eat high-potassium foods every day. Bananas and orange juice are good, but potatoes are even better (the potassium is in the skin). Winter squashes are excellent. Beet greens are fantastic.

Keep asking questions!

Abby