Are My Memory Loss, Headaches, and Vision Problems Connected?

You seem to feel weakened as your legs are not strong. Feeling sleepy most of the time and neck pain might be due to the problem in your neck bones. Not being hungry is also one of the consequences of the issue. Get some sleep and perform the exercises gently so as to reduce neck problems. The best way to maintain your energy levels is through eating small, healthy meals.

As per the complaints, this is a case of Sinusitis.

If you have sinusitis, the doctor may be able to recommend additional medications to relieve your symptoms, such as steroid nasal sprays or drops to reduce sinus swelling.

antihistamines - if your symptoms are caused by an allergy

Antibiotics - if you have a bacterial infection and are severely sick or at risk of consequences, antibiotics may be prescribed (but antibiotics are often not needed, as sinusitis is usually caused by a virus)

I understand your niece­ faces brain meningioma and a tumor in her right e­ye nerve – se­rious conditions, yet treatable. Me­ningioma often brings headaches, vision trouble­s, and weakness. Eye glioma risks vision loss. Tre­atment options: surgery, radiation therapy, me­dication. The key is working closely with specialists to choose­ the best care path for your niece­.

You can't get to sleep and walk around like a zombie during the day. If you have dreams every time you sleep, however, they may be short, and you are not getting REM sleep which is the deep sleep you need. As a result, you may feel you have more energy than you do. Thus, this might be a sleep disorder. If the problem persists, see a sleep specialist who can help with the evaluation and therapy.

You might be having the pain due to the neuropathy. Therefore, I advise you to make an appointment with a neurologist who specializes in such conditions. They may recommend you some tests in order to deliver a diagnosis and a treatment plan that will help you in controlling your pain.