Yeah I know, I find it difficult too.

But thankfully you only need do that for 3 days straight, then you can take a break - E.g. 3 days on, 3 days off (or more)and repeat the cycle until you're well. Some may extend their chelation rounds to a week on and a week off, but it depends on what is preferred/convenient. Some people may chelate for 3 days straight and may take a week off as a break. Some may just chelate on weekends.

3 days is long enough when you're chelating constantly every 4 hours. I don't tend to do longer rounds, unless I feel up to it. Some people may feel really good whilst chelating and may wish to keep going for longer. But the body needs a break inbetween rounds to recuperate/replenish mineral levels and broken sleep.

Yeah, mercury can indeed cause insomnia. I've suffered most of my life with difficulty sleeping. The candida diet has helped that alot though and the increase in protein foods and animal fats. Made a huge difference in my ability to sleep!