Losing My Voice

I'm Seronegative and have been losing my voice on and off for the past couple of months with no changes in medication or other factors such as a secondary illness that would account for it. I came across this site, https://voicefoundation.org/health-science/voice-disorders/voice-disorders/voice-dysfunction-in-neurological-disorders/myasthenia-gravis-mg/ which seems to indicate that most of the cases of laryngitis, hoarseness, vocal fatigue they've seen in MG patients were Seronegative. I haven't found much discussion of the issue in MG related forums, so I'm unsure how common it is. I'm hoping to find information that may aid in restoring my voice and help others that are seeking the same answers.