I have a severe headache , numbness in the left arm , indigestion, diabetes and COPD.

Since your question did a week ago, I trust you have already gone to your doctor and have already addressed the problem. As you know, people with diabetes often develop unusual symptoms associated with serious problems. In most cases, this is due to the damage that diabetes causes in the autonomic nervous system (the nerves that supply internal organs and blood vessels). Indigestion, numbness in left arm and headache could be symptoms of an impending heart attack in a diabetic person. Moreover, you may be experiencing a transient ischemic attack (TIA or "mini-stroke") or even a full stroke. Being diabetic, your "index of suspicion" should be much higher than a non-diabetic person. Any unusual symptoms that persist for more than 15-20 minutes required to quickly call your doctor or go immediately to the ER.