Confused , need help 19M

Idk what to do anymore, it all started 1 year ago or so with mild low back pain , fast forward 1 year I have more intense pain in my shoulder inner knee neck , base of skull , sometimes elbow , and feel like all my back muscles are so tense and painful as if I’m trapped by them. Generally worse in the morning but not always. No fatigue , no brain fog if not very minimal sometimes . I’m not very sensible to touch if not where I’m tight but even there I can press and it only hurts as if it’s tense. Well I did 397594 test and nothing came out , I really don’t know what’s wrong with me , anyone else has something similar to me. At this point I’m hoping to have FM instead of ankylosing spondylitis since it would make it way more manageable .