question

i am planning on fasting this yom kippur, including no water, but
while at services tonight for rosh hashana, i got terrible heartburn
(rare) and had to eat some tums, which solved the problem.

what am i supposed to do if i get unbearable heartburn like that on
yom kippur? i know you aren't supposed to fast if you are sick, so i
guess what i'm asking is, does it still COUNT as keeping the fast? or
is this like 12-steps where if you have one drink, that's it, you've
lost your 27 years of sobriety, or whatever, and having to start
counting all over again from day of birth. (people who see it as such,
these are considered the 12-step nazis, to whom i am opposed.i think
of it like a muscle, a pathway in your brain, learning a new way, and
it builds, strengthens, and grows, and it doesn't all just disappear
in a day, so that. is why i am anti-nazi.)