With such a list of serious health problems that you have described, I hope you have opted for qualified supervision of your fast.
It would be a wise choice to also have your own Blood Pressure monitor with a built-in pulse reader as well, and take these readings in a resting state such as on arising first thing in the morning.
Fasting is a safe process of course, but I would err on the safe side and keep an eye on your vital signs; the most important thing to watch for are SUDDEN changes such as in a lowering of Blood Pressure and reason to break your fast immediately.
It concerns me greatly that we have no way of telling how familiar and knowledgeable members are of the fast and the fasting process, which are essential and strongly advisable requirements before beginning a long fast.