I would be more concerned about your blurred vision
& your neck pain
being exagerabated with hot bath.
Have you seen a physician yet & have your retina
checked. If you haven't I would suggest you to do so.
You would need a CT/MRI to rule out Multiple Sclerosis/other demyelinating disease
of nerves. It sometimes presents as visual symptoms 1st because of the optic nerve(nerve responsible for our vision) involvement.