Thanks for the query.
Yes,ear problems can sometimes lead to dizziness
So you better once consult ENT surgeon and get examined to find out the actual cause of your dizziness.
Probably he can guide you better in this matter as you are having problem in ear.
After consulting him, if he advices you can continue the medicine adviced be your your obstetrician.
If you are feeling excessive dizziness better to take take leave for few days till the symptoms resolve.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429