Since its constant, it is very likely it could be attributed to a vestibular disorder . You need to look into your paperwork or just request the following test as a start

1. vHIT test (not to be confused with the SPEM test which is a standard bppv test that ENT's use). They are very similar and both use goggles & an led light, however they are 100% different.

2. Do you remember if they put air or water in your ear? was this done? if not, this is called a calorics test