Why is my heart beating so fast and why am I so out of breath even though I am just sitting down and relaxing?? Why do I feel like I will explode if I don't get out?

You are most probably having an anxiety or panic attack. The situation you feel like escaping is exactly what is trig-erring such response. You will need to speak to a qualified therapist to help you get to the root of the problem

That's the problem, you're NOT relaxing. This is called heart palpitations caused by anxiety. The worst part is the more you become aware of the symptoms the worse the symptoms gets. And when this happens it's very difficult to be comfortable in your own skin.

Do you have anxiety? Is something on your mind? Relax you're breathing. Stay calm. Release every thought that is stressing you out and replace it with a happy one. Your happy place. And don't forget to breathe.:)

It sounds like you are going through a panic attack. A good method to use is to close your eyes, put on some soothing music or a quick meditation. (try youtube, there are some great ones!) If in crisis, you can always call nationwide hotlines to be talked through your situation. You are not alone! You can overcome this!

Anxiety sweetie :)

Could it be that you're putting pressure on yourself to get out, but something is stopping you? Therefore, maybe anxiety could take place causing the fast beating and it can become hard to catch your breath?

Sounds like anxiety. Check out this page for great coping methods :) Good luck and take care :D http://www.mind.org.uk/information-support/types-of-mental-health-problems/anxiety-and-panic-attacks/self-care-for-anxiety/#.VWTwYc9Viko

You may very well be having a panic attack. Try to focus on your breathing and try to focus your mind.

You're probably having an anxiety attack. Sometimes things like that can happen for no reason or if they have a reason, it's called a trigger. There might be something causing you to feel that way, whether it be a fear or something else.