Why is my heart beating hard and fast

you're being too cautious, seriously, it's called being a hypochondriac, meaning there's nothing wrong with you but you like to think there is. stop freaking out,

ur getting stressed - and i think its in your head. you see all this stuff around you that scares you, so it can "happen" to you. i remember one time i watched on the news where this kids throat was closing... next day i was from school cuz my throat was closing.. lol. also, my grandpa had a heart attack and i kept catching myself feeling my left arm hurt and thought i was having one. you need to find something that relaxes you because just by the way you typed that out i can tell your stressed. if it continues, plz get to a health care provider asap.

you just need to calm down and relax. you could go to the doctor to run some tests if you're really worried.. i just think you could be stressed, but i'm no doctor

Panic Attacks can also involve a rapid heart rate.

U have to calm down and relax ur just scared or nervous or u were moving a lot just calm down and get ur mind off of it

yes its the caffine and stress you need to STOP drinking caffine and relax alot trust me i know this

It happens to me when I fear somthing greatly.

First of all, you need to cut back on the chocolate as it is full of caffeine. If you must drink soda, drink caffeine free. Tea has alot of caffeine also, but you can drink decaf in moderation - the same thing goes for coffee and coffee beverages. I have been getting a fast heartbeat and my doctor made it very clear that caffeine is a NO - NO. I have a hard time giving up chocolate completely, it really is addictive and when you are stressed, sometimes you tend to crave junk foods too. Eat more fresh fruits and a handful of almonds or walnuts is actually good for your heart, and last but not least, please see your doctor to rule out any significant problem, whatever it is, I am sure it can be treated, whether it is anxiety or an irregular HB. Take care of yourself.

The first thing I would think of is stress. I went to a small private school that was so stressful I had a nervous tick, constant tension headaches, and stomach issues that all went away after I graduated. The Second thing I would think of is what medications are you taking if any? Also, are you eating good nutrition every day all the time? I mean cookies aren't going to kill you, but were they your lunch? I also went thru a phase where a couple times a day I would inexplicably and uncontrollably hyperventilate until I nearly passed out (wasn't stress, I went to a public school that year so it was a little too relaxing and I had trouble reajusting to my private school again, r/e). It could be one of those things you just go through and grow out of.