First foremost important thing is RELAX, you are not sick,,the episode was just time being...you were maintaining bad sleep habits in the recent past. And that I see you are too young to be on escitalopram, I would rather suggest have healthy lifestyle and proper sleep pattern avoid staying up at night , take good multivitamin supplements, take nutritious food.
Spend time on meditation and physical exercises
Next Steps
continue with vestibular rehab exercises
Health Tips
avoid being anxious, avoid using headphones if you use any, avoid staying up late hours, have proper 6-8 hours sleep