I am having double vision. Eye fatigue and eye pain which get worst every after noon. Now a days having feverish feeling, chills, jaw ache, sometimes chest pain radiating to left arm and breathing difficulty(normal ECG). Am I really having Myasthenia gravis? Earlier too i had same symptoms and got improved with myestin 60 mg tablets for 4 years. But all myasthenia gravis tests were negative. Sometimes my eye pain radiate to face and jaws.