This is where I can help you..... I would like to take a guess that you haven't always felt this way, i know that you may have been feeling like this for a very long time BUT there was a time when you didnt feel consumed with anxiety, maybe as far back as school or even as a baby. When we are born our emotions are inside us, ready to go, and that includes anxiety, but I would imagine that your anxiety and negative emotions didnt begin with this all consuming feeling, it is our perception of things as we move through our life that can cause our anxiety to increase.  
And anxiety is a bugger because it has a habit of spreading and invading other areas of you life too, leaving you then more fearful which leads to you stopping doing the things that you used to, all in all your subconscious is praising itself for keeping you safe and out of harm.  Now, in answer to the question will anxiety kill you isn't as simple as you may initially think. 

Anxiety can have huge implications on your body and can give you a huge list of physical symptoms.

The Central Nervous System - Long-term anxiety and panic attacks can cause your brain to release stress hormones on a regular basis. This can increase the frequency of symptoms, such as headaches, dizziness, and depression.

When you feel anxious and stressed, your brain floods your nervous system with hormones and chemicals designed to help you respond to a threat. Adrenaline and cortisol are two examples.

While helpful for the occasional high-stress event, long-term exposure to stress hormones can be more harmful to your physical health in the long run. For example, long-term exposure to cortisol can contribute to weight gain.

The Cardiovascular System - Anxiety disorders can cause rapid heart rate, palpitations, and chest pain. You may also be at an increased risk of high blood pressure and heart disease. If you already have heart disease, anxiety disorders may increase the severity and the risk of coronary events. 

The Digestive System - Anxiety also affects your excretory and digestive systems. You may have stomachaches, nausea, diarrhea, and other digestive issues. Loss of appetite can also occur.

There may be a connection between anxiety disorders and the development of Irritable Bowel Syndrome IBS after a bowel infection. IBS can cause vomiting, diarrhea, or constipation.

These symptoms are bad enough and they're not everything what about the problems anxiety can have on your 
Immune system, Respiratory system, Depression, Social Isolation and Muscle Tension 

So my job as briefly as possible is to untangle all of those anxiety threads that have got everywhere and replace them with positive, self affirming techniques that are designed to help you to feel in control and calm of your emotions and get you in a happy mindset that will help improve and maybe even extend your life x