Thanks for using the forum. I am happy to address your questions, and my answer will be based on the information you provided here. Please make sure you recognize that this forum is for educational purposes only, and it does not substitute for a formal office visit with a doctor.
Without the ability to examine and obtain a history, I cannot tell you what the exact cause of the symptoms is. However I will try to provide you with some useful information.
From the symptoms you are describing it appears unlikely that this is something which requires urgent evaluation. Also you are 30 years young and have already had a cardiac workup to evaluate for a dangerous cardiac cause
From the symptoms you describe one thing to consider is something called a compressive cervical radiculopathy.
Radiculopathy occurs when nerve roots (coming out of the spinal cord) become compressed at the neck or spine and this results in pain, tingling, and numbness, with or without loss of function in the area supplied by the affected nerve (which can explain why your arms “fall asleep”). Common causes of cervical radiculopathy are neural foramen narrowing (neural foramen is the canal through which the nerve exits) , usually caused by cervical arthritis in older adults, and cervical disk lesion caused by disk degeneration or herniation. Disk degeneration results in loss of disk space, with closer approximation of the vertebrae on either side of the involved disk space and subsequent impingement on the neural foramen. The decrease in size of the neural foramen results in nerve root compression. The cervical disk spaces are more often affected. Disk herniation also occurs more often in these.
Common symptoms include pain radiating to the shoulder or down the upper extremity, which may be aggravated by coughing, sneezing, or straining; tingling of the fingers; and less often, weakness in the extremity. You may have tenderness on the neck, limitation in certain movements of the neck.
Diagnostic tests include radiographs of the cervical spine, which may appear normal or may show loss of normal cervical lordosis, narrowing of the disk space, and bone spurs with foramen encroachment. MRI identifies soft tissue structures and may show displacement of the disk.
Treatment relieves pressure on the affected nerve and is mainly conservative, including rest, pain relief, stress reduction, and short-term muscle relaxants. In your case, this may include posture correction and good neck and back support wihen you sit at the computer. If symptoms are persistent you may need structured physical therapy and referral to a neurologist. Neurologic signs and symptoms and loss of strength are also indications for referral to neurosurgery. A few patients require surgical intervention.
Other possibilities which are less likely include a carpal tunnel syndrome or a compressive neuropathy at your elbows if the numbness/pain is restricted to your forearm or hand respectively.
I would recommend evaluation by a neurologist. Good luck
Sorry, I'm new here; I received two emails saying I had responses to this question, but I'm seeing none... is there something I'm missing?