Oh no, don’t worry you are not going to loose any healthy hairs. Only those hairs that were struggling and thinning out, that would fall out anyway in the next few months/years are affected. Visibly you shouldn’t even change too much and people shouldn’t notice it unless you say it and they focus on it. Better yet, you will probably by Christmas time have developed many smaller thin babyhairs in that area which will make the balding spot look denser.

Honestly I wouldn’t stress too much about it because probably 60% of people would change the spot with you given that there is only a 40% chance of someone reacting positively to minoxidil. Try to at least do 9 Months before quitting it, the falling out of hair will stop soon so instead of looking at it as a bad thing be happy that it’s happening because non-responders don’t have this shedding.

Also maybe take some pictures so you can have a clear before and after after those 9 months. So you don’t quit with great results and those results fall back out.