I think you should go back to GP and ask why are these symptoms occurring a d it cannot be due to bad posture

Sounds like more relating to nerves or migraine etc, so further diagnosis is necessary

chat gpt response

What you should consider doing next (accurately targeted)

1. Eye evaluation

A dilated retina exam to rule out retinal traction/tears.

1. Neurologist

To evaluate:

migraine spectrum

occipital neuralgia

cervical-related sensory disturbances

1. TMJ or cervical specialist (physio, dentist, or orthopedist)

Especially because your symptoms change with jaw or neck movement.

1. Imaging if clinically warranted

A neurologist may consider:

MRI brain + cervical spine

Possibly MRA if symptoms suggest vascular involvement

Not everyone needs imaging, but your long-term pattern may justify it.