Houston has a lot more pollution than a farm in northern indiana. I'll bet that's what's doing it to you.

Unfortunately you can't really control your asthma further without taking more or different medications if you're not currently being controlled -- which is how things sound. You're not in control.

Look into what's working for you and what's not working. Look into possibly switching from Flovent to Advair (adding a long-acting bronchodilator -- they work wonders) or switching to combivent instead of albuterol for a rescue inhaler.