Welcome in H.C.M. for choosing regarding query.
I had analyse all aspect of your symptoms and after co-relating them it appears as you are having eustachiantube dysfunction along with acute otitis media
Your acute infection is responsible for associated labyrinthitis
and thus giving rise to nausea.
Here I would like to suggest you -
1- Take Antibiotic.
2- Keep ear clean & dry.
3- Take analgesic
and anti inflammatory.
4- Take Anti histaminic.
5- Steam inhalation.
I hope this will help you and you will recover soon