I am experiencing shaking hands or tremor, dizziness (better by: rest) (worsened by: changing head position, after exercise, hot weather), vision fading of colors, difficulty breathing (quality: noisy), shortness of breath (time frame: gradual onset) (

See doctor. You have many symptoms here. You need to have them evaluated so you can have a diagnosis. Once you have a diagnosis to explain your symptoms you can get a treatment plan .
Varied symptoms. These varied symptoms may not be explainable by a disease but can be due,in part, to anxiety. Inner ear disorder, overactive thyroid and familial essential tremor also are possibilities. If you're short of breath at rest but not during physical activity, anxiety is very likely. Stress management therapy should be helpful in this regard. A checkup by your physician and consultation with neurology.