I put all your OP and the update on the clear CT scan into AI and asked for their top diagnosis based on symptoms and whether you should attend A&E. It said you should go to A&E!
Tbh, you will wait ages for a referral through your GP and the hospital will also see your history on this matter so it should support a faster track appointment/admission etc...
What you’ve described includes several serious and complex symptoms, and while I’m not a doctor, I can help you explore some possibilities based on what you've written. But to be clear: you need to push to see a doctor urgently (ideally a neurologist), and not stop until you're thoroughly investigated.
Here are some possible conditions that could be related to your symptoms:
- Intracranial Hypertension (Idiopathic or Secondary)
Symptoms fit really closely: headaches, vision problems (especially in one eye), pulsating tinnitus (the thundering sound), dizziness, nausea, vomiting, exhaustion.
Often missed unless a lumbar puncture is done to check pressure.
Common in people who are/were overweight, even after significant weight loss.
A CT scan might be normal; often an MRI and eye exam (for papilledema) are better at spotting it.
- Chiari Malformation
Structural issue at the base of the skull where brain tissue pushes into the spinal canal.
Can cause headaches, dizziness, memory issues, blurred vision, balance problems.
Often missed on CT; MRI is better.
- Brain Tumor or Lesion
A CT might miss small or slow-growing ones, especially in certain locations.
Focal symptoms like unilateral headache and blurred vision in one eye, memory problems, severe fatigue could all point toward this.
Again, MRI is more definitive than CT.
- Temporal Arteritis (Giant Cell Arteritis)
More common in people over 50 but not impossible in younger people.
Symptoms: severe one-sided headache, vision issues, jaw pain, and fatigue.
Needs blood tests (ESR, CRP) and possibly a biopsy.
- Severe Sleep Apnea or Narcolepsy
Could explain the extreme fatigue, memory issues, headaches.
Sleep apnea is more common in those who are/were overweight.
Sleep study would be needed to confirm.
- Endocrine Disorders (Adrenal Insufficiency, Hypothyroidism, etc.)
Can cause fatigue, dizziness, low energy, nausea, cognitive issues, and weight changes.
Blood tests can often catch this.
- Medication Side Effects or Interactions
Lithium and some antipsychotics or mood stabilizers can cause neurological side effects or toxicity, especially if levels are not being monitored.
Withdrawal or dosage changes can also wreak havoc.
- Vestibular Disorders / Inner Ear Issues
Might explain dizziness, muffled hearing, and balance issues.
But wouldn't explain the level of fatigue or unilateral headache.
- Autoimmune or Neurological Disorders (like MS)
Fatigue, balance issues, vision problems, brain fog, and weakness could align.
Needs full neurological workup, often with MRI and blood tests.
Next Steps You Should Absolutely Take:
- Go to A&E or Urgent Care again today—especially because the headache is worsening, you're vomiting, you nearly collapsed, and your eye is blurry.
- Insist on an MRI (not just a CT) and possibly a lumbar puncture if intracranial pressure is a concern.
- Eye exam with an ophthalmologist—they can check for papilledema or optic nerve swelling.
- Bloodwork, including inflammation markers (ESR, CRP), thyroid function, and electrolytes.
- Ask for a neurology referral ASAP.
- Bring a written symptom log, like this message, to your GP or ER doctor—this will really help make your case.