Here is a list of diagnostic criteria for lupus:

butterfly-shaped rash over the cheeks - referred to as malar rash
red rash with raised round or oval patches - known as discoid rash
rash on skin exposed to the sun
Mouth sores: sores in the mouth or nose lasting from a few days to more than a month
Arthritis: tenderness and swelling lasting for a few weeks in two or more joints
Lung or heart inflammation: swelling of the tissue lining the lungs (referred to as pleurisy or pleuritis) or the heart (pericarditis), which can cause chest pain when breathing deeply
Kidney problem: blood or protein in the urine, or tests that suggest poor kidney function
Neurologic problem: seizures, strokes, or psychosis (a mental health problem)
Abnormal blood tests such as:
low blood cell counts: anemia, low white blood cells, or low platelets
positive antinuclear antibodies (ANA) result: antibodies that can cause the body to begin attacking itself that are present in nearly all lupus patients
certain abnormal antibodies: anti-double-strand DNA (called anti-dsDNA), anti-Smith (referred to as anti-Sm), or antiphospholipid antibodies

Other symptoms associated with lupus:

Extreme fatigue (tiredness)
Headaches
Painful or swollen joints
Fever
Anemia (low numbers of red blood cells or hemoglobin, or low total blood volume)
Swelling (edema) in feet, legs, hands, and/or around eyes
Pain in chest on deep breathing (pleurisy)
Butterfly-shaped rash across cheeks and nose
Sun- or light-sensitivity (photosensitivity)
Hair loss
Abnormal blood clotting
Fingers turning white and/or blue when cold (Raynaud’s phenomenon)
Mouth or nose ulcers

What I have personally started doing is taking picture and documenting my symptoms everyday to show my doctor. Lupus is very hard to diagnose do to the varying symptoms that occur with the disease. Not every lupus patient has the same symptoms. I would consult your medical professional, take a list of symptoms and any evidence you may have. 4 out of the 11 diagnostic criteria will alert most doctors to perform more tests and have you go from there.

I hope this helps!