Coffee food symptoms and conditions

I used in the past Flonase and worked. This time, I used the "generic" by other laboratory. I used it only once.
Developed a headache, felt virus-like symptoms and blisters on my lips. The most uncomfortable side effect ... 12 days and counting, everything with an aroma (or smell), smells the same, like some chemical. Even coffee, food. Have not used it again but side effects continue. Have tried saline spray to clean nostrils ... nothing has worked. Just wait??