RUSSLA - I must congratulate you on your efforts. Unfortunately your biggest mistake was that you had not done your research before attempting the fast. Btw, before I continue I must mention that as I write this I'm on day 38 of a water fast, so I do have some idea of what I'm talking about.
Fasting, although a natural process, can be extremely challenging especially if your body is very toxic. You can experience severe cleansing reactions that if you are not prepared for them will likely make you think that something is wrong and cause you to abandon the fast prematurely.
When you fast your blood pressure drops which is why you feel faint when you stand up, you have to be careful of that. Being cold is also normal, unfortunately you've made a mistake of going to the hot tub to warm up. Low blood pressure, mixed with extremely hot temperatures and chlorine - no wonder you passed out.
Even if you don't believe in raw lifestyle check out this link. Chapters 45-48 talk in depth about fasting.
Introduction To Fasting