It is possible that some of these symptoms are anxiety, such as the ringing in your ears, since it only happens at night or when it is quiet, meaning that you are more focused on yourself than on anything else and have no distractions. Feeling off balance and light headed is a common anxiety symptom. Your vision impairment could also be paranoia or even the result of lack of sleep and worry....and even stress.
To rule out the possibility of it being serious, you can schedule an MRI and vision screening, but if the results come back clear, you must accept it for what it says, keep taking your medication, and try to relax a little more.