The first and number one thing you should do is see a doctor for a physical and blood work.
Withdrawl symptoms can mentally convince you that you are on your death bed and the symptoms you describe IMO are typical for someone who has just stopped drinking , I had the same stuff goin on.
Keep calm and see a DR and be completely honest with him/her as to your drinking habits. Of course if it gets out of control get to the ER, oh and stay away from Googling your symptoms