Confused with questions on my flare symptoms

Hi guys I’m a 24 year old male and have been struggling for the past 6 months with flares and episodes of extreme fatigue, full body joint pain, headaches, left tonsil/glands get inflamed, hot flashes dizziness, etc. have tested for a bunch of autoimmune and all came back negative so far… advise ctd test was all negative, inflammatory markers negative, etc. so basically ruled out lupus, RA, mctd… I’ll be good for a week then bad for 1-2 days then good for 2 weeks then bad for 2 days so on and so forth. Just very frustrating and I’m miserable. Going to try to get my hormones checked and some odds and ends autoimmune as a last resort. Anyone relate?

Edit: I forgot to mention I have an enlarged thyroid and was negative for Hashimotos, graves, etc. with heterogenous echotecture and cysts on the thyroid.