Pharmaceutical drugs can cause all sorts of side effects that can trigger all types of immune responses. It likely damaged or drained one your organs causing your immune system to be suppressed…allowing candida to grow.
You also likely had a slight candida overgrowth for awhile beforehand if you took antibiotics in the past. I would more closely look at antibiotics causing your problems because they destroyed both the beneficial and bad bacteria in your gut. Dr. Mcombs feels that even one dose of antibiotics can cause a gut flora imbalance and should be followed up with an extensive use of probiotics.