You will likely be fine. If you haven’t had ED related issues in the past, this is very normal for some people when fasting.
Imagine being on the primordial plains, millions of years ago. You’re starving. What is the priority? Reproduction or eating? Self preservation is job 1. So your body is making adjustments. BP drop is common, electrolyte imbalance is common, hormonal changes are common.
Fasting will not do permanent damage down south. Or else the human race would not exist.
Good luck and keep us posted.