is my fight or flight response broken?

[Durvis]

A couple of months ago I started getting a weird sensation. All of a sudden it felt like my heartbeat became real weak (usually I can tell my heart is beating but now I can't feel it) and I felt a general fatigue along with headaches. The thing that is weird is that I am usually an anxious person and when I would get stressed or nervous I would feel my "fight or flight" response kick in (raised, heavier, heartbeat, a little more on edge.) Now it feels like when I get nervous my body does the opposite. It feels like it just gives up. My heart rate doesn't respond (doesn't beat slower or faster), I get light headed, my body just feels like it wants to shut down. I have had cardiac tests done, had cortisol levels done. I don't know what to do It feels like my body is too weak to want to do anything. I have zero energy. I was wondering if anyone could let me know what this could be? Plz help.

Other symptoms:
tight throat
tight chest
sore muscles in chest

[Dr. Kokil Mathur]

Hi

I personally feel that you are very stressed out and anxious. You have had a lot of tests done. Maybe you should discuss your fears about your health with a good physician. Taking anti anxiety pills may help and so also yoga and meditation.

The symptoms are real and are definitely making you very anxious and stressed out. Once you are relaxed, you will feel better. Taking multivitamin pills will also help.

Please let me know if there is any thing else and keep me posted.

[Durvis]

I have had numerous ECG's which were all normal. I wore a 2 week event monitor which was normal and I also had a stress echo done which came back normal. I don't understand why I still feel this way.  I have also had my thyroid levels taken which came back normal. I am only 23 so I don't thing this can be heart disease or failure. It just feels strange. Usually I feel my heartbeat in my chest and now it just feels really tight and my heartbeat feels numb like it isn't there. When I get nervous I usually feel my rate pick up, so when I can't feel my heart start pumping faster it makes me feel like there could be something not right and like my body isn't responding.

[Dr. Kokil Mathur]

Hi
“When a heart slows for no apparent reason, however, it can be a sign of an abnormality in the electrical pathway and is cause for evaluation. If the problem is in fact a slow heart rhythm (bradycardia), a pacemaker is often the treatment of choice.”
“Sick sinus syndrome (SSS) is a form of bradycardia in which the sinoatrial node (the heart’s natural pacemaker) is not functioning as it should. This means that the electrical signals that normally start a heartbeat do not all leave the SA node (sinoatrial block) or that there are longer pauses in the generation of the electrical signal (sinus arrest). SSS can cause tachycardia (heart rates that are too fast) or bradycardia-tachycardia syndrome (heart rates that fluctuate between being too slow and too fast).”
“Slow heart rates can be the result of certain medications, congenital heart diseases or the degenerative processes of aging.”
Apart from an ECG/EKG you need a holter study where your heartbeat will be recorded round the clock for a fixed period. I am not sure what cardiac tests you had.Please discuss with a cardiologist about this.
Alternatively it will not be a bad idea to get your self tested for hypothyroidism and diabetes. Please consult your physician about this.
Hope this helps. If you need more help, please feel free to contact. I’ll be happy to answer your queries. Please keep me posted.