hello and welcome to HCM,
I will try to analyze your problems one by one
About the painful lump you need to take a course of antibiotic like amoxycillin-
clavulanate 625 twice daily for five days and if that does not help you need to undergo FNAC and CT in the neck and get back to me with the report. Your doctor will know about the medications.
About the painful singing, you may be developing a nodule which is very common in teachers and pain on vocal strain is one of the commonest symptoms of the same. You need to get an analyses with
endoscopy and also with a speech therapist and get back to me with the reports.
Your
diabetes since is recently diagnosed you will definitely have some amount of
fatigue in the initial phase as it takes time to get a good control and get used to the medications. Give it around one to two months and do not worry. If you still feel unwell then meet an
Endocrinologist.
The SAH can cause
vertigo and speech problems but it is advisable to undergo a CT of the brain and
temporal bone or the ear to evaluate the same.
Hope your problems get settled, Get back to me with the reports whenever possible
regards
Dr Sriram Nathan