@Photonate (((safe hugs))) I hope you feel better. Whenever it comes to these kinds of symptoms and any spinal injuries, it is best to have a physician look at it. They could take x-rays, MRIs, or other tests to determine if it's a worsening condition, bursitis, related to your previous injuries, or a new injury, new tumor, new thyroid condition, new lymph node issue, new brain/neurological issue, possible heart- or lung-related issue, or some other strange issue that we laypersons don't know but trained physicians would.

It's better to be safe than sorry by seeking care with your treatment team. Ask for an appointment as soon as possible. See if they have time to squeeze you in before the holiday rush and uptick in Covid-19 cases (which will likely follow Halloween and all the major holidays, along with flu cases). The sooner the better in your case. It could be a serious issue, or it may just be an issue that warrants minor meds and lots of rest. Either way, it's best to have a physician tell you that than a bunch of anonymous persons online here.