I am experiencing rapid heart rate (worsened by: psychological stress) , difficulty sleeping (quality: difficulty falling asleep) ?

Depression/Anxiety: These symptoms could be due to anxiety, depression, or PTSD. You don't specifically state a question here, so I would need more information to fully answer. I would encourage you to get a full medical work-up to rule out an "organic" cause of these symptoms (ie, something with your heart, lungs, hormones), but consider that these symptoms could due to psychological stress.