@brayimee I see you have had some spine imaging. Did you have imaging of your cervical spine too? Have you had a whiplash injury? I ask because that could explain some of the symptoms you have. A whiplash can damage discs which later bulge and herniate which can cause compression of the spinal cord or nerves that exit the spine at the nerve roots. If you have spinal cord compression, it can cause bladder/bowel issues and heaviness in the legs and an uneven gait. A whiplash can also damage other neck muscles and cause thoracic outlet syndrome which compresses nerves or vessels because of tight muscle or scar tissue in muscles through which the nerves pass. That can cause tightness in the chest which can contribute to a racing heart. I have had a whiplash that caused spinal cord compression which affected my ability to walk. It gave me weird pains all over my body called funicular pain. I had surgery at Mayo Rochester to decompress my spinal cord which gave me my life back. I have thoracic outlet syndrome (TOS). Mayo is a good place to have that evaluated because there are not a lot of doctors who understand it and you could have both of these issue contributing to the problem. Treatment for TOS has been long term physical therapy for me with myofacial release. Facial pain can come from TMJ and that can be related to having TOS. I have experienced that too. Here are some links for information.
https://www.mayoclinic.org/diseases-conditions/thoracic-outlet-syndrome/symptoms-causes/syc-20353988
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/
https://www.ncbi.nlm.nih.gov/pubmed/20938789
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3111492/
https://mskneurology.com/how-truly-treat-thoracic-outlet-syndrome/
https://mskneurology.com/true-cause-solution-temporomandibular-dysfunction-tmd/