Severe joint pain

Hi, welcome to the ehealth forum and I am glad to help you.
Your concern is regarding Fibromyalgia and Lupus.
Fibromyalgia syndrome (FMS) is characterized by widespread pain and fatigue. Fibromyalgia means pain in the muscles, ligaments and tendons - the fibrous tissues in the body. Viral or bacterial infections, automobile accidents, or development of another disorder, such as rheumatoid arthritis, lupus or hyperthyroidism can bring about the onset of fibromyalgia.
On the other hand, Lupus is an autoimmune disease in which tissues and cells undergo damage mediated by tissue binding autoantibodies and it causes the immune system to attack the body's own tissue and organs, including the joints, kidneys, heart, lungs, brain, blood or skin. Symptoms can range from mild to life-threatening and can vary greatly from person to person. Common initial and chronic complaints include fever, malaise, joint pains, myalgias, fatigue, and temporary loss of cognitive abilities. Because they are so often seen with other diseases, these signs and symptoms are not part of the diagnostic criteria for lupus. The most commonly sought medical attention is for joint pain, with the small joints of the hand and wrist usually affected, although all joints are at risk. Research says that more than 90 percent of those affected will experience joint and/or muscle pain at some time during the course of their illness. Approximately one third of patients with lupus also develop fibromyalgia. Lupus can also have periods of flares (attacks).
You also seem to have Raynaud's syndrome or Secondary Raynaud's which can develop secondary to various connective tissue disorders like lupus, scleroderma, rheumatoid arthritis etc.
The symptoms of fibromyalgia can be mistaken for lupus and rheumatoid arthritis. It is suggested that there might be an association between rheumatoid arthritis and lupus. So you must consult a rheumatologist to reach a definitive diagnosis as the same cannot be made online. You can get ANA tests and keep follow up with your rheumatologist for other tests to reach definitive diagnosis in your case.
Hope this helps. Take care.
Note: This post is not to emphasise final diagnosis as the same cannot be made online and is aimed just to provide medical information and no treatment suggested above be taken without face to face consultation with health care professional.