May i know more about your panic attack, especially the heart rate part. does it gradually racing up & subsides instantly after the breathing exercise?

Last month i have symptoms of physical panic attacks although my mind was clear & not really anxious.
I got a sudden increase of racing beats out of nowhere without any alarming thought, no strenuous activity at all during attack.
After experiencing a few sudden racing episode & feel ashamed to measure my heart rate with mobile apps at work (usually within 130+ bpm), i finally bought myself a fitbit device.
2 days after I got a quite nasty panic attack that sends my heart rate from 100+ to 171bpm in seconds. spontaneously cough up this one & it drops suddenly to below 100 bpm. Crazy but amusing at the same time. No other symptoms, no hyperventilation & dizzyness, just the racing beats.

Although my physical symptoms are brief but it was quite painful...lol. annoying pressure feel in chest & my back hurts hours after that episode. I got intermittent palpitation for days...lol, become very sensitive with food.

I dont think my panic was triggered by emotions, it maybe something i've eaten....for the last 6 weeks before the big attack i quit carbs cold turkey & embark on a high intensity exercising but without proper sleep & rest. I accidentally dropped on the diet bandwagon & have eaten white breads & more carbs for a few days. It looks like my body really hated that shit im eating.

Thank goodness it's been 4 weeks i dont experience it anymore. Just hoping that was the last one.

on July this year
Appreciated your response.

Just a short story about me here:
I myself too in the past, few years back i did feel a bit moody & lost with low esteem, poor communication just because of working night shift for almost a year.  The resource & encouragement i had was minimal, it makes me quite anxious with people & slowly it was affecting my work performance. I always feel negative & thinking people will always talking bad about me behind my back. I snapped so easily. I was in big trouble in the verge of losing my job, hence im asking for a counselling session while doing the dreaded improvement plan.
The counselling somehow worked, it feels like a great relief to be able to talk to a professional 3rd party without prejudice about my background. Once the mind has been set clear (i just learn to be assertive in communication with people) the rest follows. Completed the improvement plan & saved my ass from being terminated.
Most of the bad people that make my life miserable (or its just me?) have moved on & the new supervisors didn't care so much about my past. I finally get all the resource & help i need to succeed.

I know the feeling of having mental stress...it may affect on the physical. when the mental are tired i have more stupid dreams, dull skin & acne due to lack of deep sleep, despondent (gundah gulana) feeling every day..but never heart palpitations.

The palpitations for me comes from physical stress. I have researched a lot on my physical symptoms for the past few weeks, yet nothing matches exactly on what i've experienced. My medical reports are good & its pretty impossible i'm suddenly getting weird heart problems at the age of 33...lol.
The only strong reason i got sudden rapid pulse out of nowhere is due to low carb crash diet.
https://www.etobb.com/question/i-have-been-...he-past-f-36353

So peeps, eat well & dont do drugs mmkay? (p/s: i dont smoke, no drug & very seldom do alcohol)