Since when are you drinking? A lot can be explained if the duration and frequency of your drinking is known. You must have already read all about alcoholism and how it affects the brain cells? Rather you gradually lose different brain cell connections. These are signs of inherent anxiety and initial signs of depression.
Next Steps
Do consult a psychologist for specific therapies for anxiety and de-addiction
Health Tips
When sober, just counter your negative thoughts. Example: You feel you will have a heart attack. You can always counter and ask did I ever actually get a heart attack? Ans: No. What will happen if I die, counter: the rate at which I am drinking I am sure to die. OR I am young and healthy why will I die, I will work harder to take care of my family. You need to practice on regular basis to counter your negative thoughts with practical thougts.