It can also mean you have some bacteria in your gut that should not be there in such numbers ... and when you kill yeast with antifungals, that bacteria becomes even stronger and poison you and makes you feel crappy.
It can also mean you do not tolerate those antifungals due to poor liver function.
Every reaction to antifungals is not always a healing crisis.
There are also many other possibilities.
Start cleansing your liver and working on improving your liver and your diet.