I'm sorry you are feeling this way.
Vertigo is the sensation of motion where there shouldn't be, often described as the room spinning. It's important to understand that vertigo is a symptom and not a diagnosis. There are many types of vertigo that can often be diagnosed based on the duration of symptoms.
If it lasts seconds and can be triggered by a motion to one side, such as laying down to the left in bed, this is Benign Paroxysmal Positional Vertigo (BPPV), defined by crystals dislodged in the fluid in the semicircular canals. When you turn your head in the direction of the problem, this causes a brief upset in the
vestibular system, which is then perceived as vertigo. It is diagnosed by the Dix-Hallpike maneuver and then treated with the
Epley maneuver.
Often the Epley maneuver should correct the problem immediately. Sometimes it needs to be repeated. There is less common version of BPPV, where the crystals are lodged in the other canal and a complete "log roll" needs to be performed. If your ENT can't help, consider a neuro-otologist.
There really aren't any effective medicines for BPPV, just antihistamines that can make people drowsy.
The subsequent symptoms do not sound like vertigo but more of a visual motion sensitivity. This could be from the Allerfin injection. In the US we have a different version of the medicine involved in
cold medicine and these symptoms sound very similar to side effects from this.
Another possibility is that this is migraine-related symptoms.