What could be the reason for fatigue and joint pain when all my tests are normal?

Hi doctor,

About 4.6 months ago, I became ill. It started with fatigue and joint pain and then progressed to the whole body pain. Every day I feel like I have the flu. I had consistent night sweats, day sweats and chills, loss of appetite at times, nausea on and off and terrible fatigue. I have a battery of tests done. It includes 12 CBCs with differentials, metabolic panels, full thyroid panel, Lymes, mono, adrenal gland testing, female hormones, blood cultures, vitamin testing, rheumatological testing, carcinoid test, allergy panel with celiacs and immunoglobulins and SPEP. Imaging studies I have had were MRI of the brain and spinal cord, cat scans of my chest and abdomen, ultrasound of my abdomen, pelvis and kidneys, HIDA scan, endoscopy and mammogram. The only things off were two CBCs had lower WBC readings at 3.8 and 3.9; my ANA is 1:1280, my ds-DNA was borderline positive and my vitamin D was low. Otherwise, all examinations were normal. I am so terrified with the thought that I have cancer. Would cancer have been picked up in all that? Am I missing something?

Hi doctor,

There is no family history of cancer. I just feel like my symptoms correlate with lymphoma or leukemia. I feel so sick. If I look up my symptoms, then they seem to match those two conditions. I am on Plaquenil now, but only for a month. What on earth could be causing the extreme fatigue, night sweats, chills and appetite changes then? I always have some joint or muscle pain. I feel like I have the flu every day. We do have a strong family history of autoimmune disease. I am also scared of something neurological since I have weird brain fog symptoms too.