Re: Uh oh! I goofed.

Ok there's my thoughts on your concerns:

1. Most people need to work up to the higher dose of cayenne so their body acclimates to it.  Also if you put the pepper in your lemonade ahead of time, it gets hotter as it sits.  I suggest you sprinkle the cayenne in just before consumption.
2. As far as communion, this is a very personal choice.  If it were me I would continue to receive the sacrament if it was important to me.  The worse it will do is wake your system slightly and make you hungry.  Since it is such a small amount of food, this discomfort shouldn't last long.  I wouldn't count it as a cheat at all.  Whatever you decide know it is the right choice for you.

Let us know how you fare,
Peanut