Nasonex and flem

I used it on and off for about two years, and recently started taking it again due to allergies... I use it sporadically, when I feel I need it. Anyway, I have had a problem about 3 times since the beginning of the year with horrible congestion, and tightness in my chest and lots of flem. It's like a sinus infection without the fever, that turns into bronchitis, but it's not that. I realized over the weekend, that this happens every time I have horrible allergies and use Nasonex. It takes weeks to get over the symptoms. I have decided after reading all of the other posts to NOT take it anymore...