Thank you for your question.
I am Dr Saha, I shall try my best to help you.
There can be a viral infection.
It is affecting voice by causing inflammation of larynx.
Runny nose, nausea can be related to it.
Dizziness can come from infection, dehydration.
Please try to keep good hydration by drinking plenty of fluid.
Avoid loud voice.
You can do warm salt water gargling.
Tylenol cold can be helpful.
Viral infection usually subsides in 2-3 days.
If symptoms continue, I would suggest to take an examination by doctor.
I hope this information helps.
If there’s anything else I can do, please let me know.
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