The symptoms you report of perception of inadequate erection, perception of poor quality of sleep, difficulty in attention and concentration and preoccupation that tension might result in heart problems are all signs of underlying anxiety
disorder- could be generalised anxiety disorder or other unspecified anxiety disorders. As preliminary routine,, you can try breathing relaxation exercises, meditation
techniques. In case you are unable to find relief, an in-person consultation is encouraged and psychiatrist
like us may consider anti-anxiety agents, bio-feedback and other psychotherapy
techniques to reduce your anxiety. Wish you speed recovery.