Hello and welcome to the forum. Here is some information on Lupus symptoms. https://www.mayoclinic.org/diseases-conditions/lupus/symptoms-causes/syc-20365789 While your symptoms could be related, they definitely are not typical. On the surface, they sound more neurological in nature. Have you had a physical lately? I would see your regular primary care doctor to go over your symptoms and see if they want to refer you to a neurologist. The tests for Lupus can be many so they usually assess based on symptoms and go from there on an individual patient to patient basis. A rheumatologist is who diagnoses Lupus. Please let us know how you are doing.
Agree with the moderator; consider consultation with a neurologist. You might also want to rule out multiple sclerosis (MS). Even though your MRI was unremarkable, around 5% of people with MS may have lesions that cannot be detected by MRI.
You had described a burning sensation in the back of your head. One thing to consider is Lhermitte's sign (aka barber chair phenomenon), which refers to a sudden sensation resembling an electric shock that passes down the back of your neck and into your spine and may then radiate out into your arms and legs. It is usually triggered by bending your head forward towards your chest. It can be a symptom of multiple sclerosis but also occurs in other conditions.
Other things to rule out: Lyme disease, syphilis, and vitamin B12 deficiency.