Hello I hope you are doing well at this time. Have you changed medications, or been put on another medication that may be causing the humming? I would suggest that you get checked to be sure it is not a physical condition, that way if it is something you can get treated for it and hopefully stop the noise. you may want to call the pharmacy to recommend something to take until you can see the Dr,
and let the pharmacist know what other medication you are taking in case you are restricted from taking certain medications . Take care sincerely Soidhonia.