Advair HFA and time please

I'm a 36 year old triathlete. I started taking Advair 3-4 years ago. I noticed immedialty that my wheezing stopped. For this reason, I thought the medicane worked well. I also noticed that heavy excersion activities became a little harder. Initially I thought it was allergies. I had less wind. I kept taking Advair because it stolpped the wheezing. 3 months ago I changed my dose from 100 to 250. My lungs started feeling heavier and it was harder for me to breath. I decided to stop taking Advair 3 days ago. I'd have headaches once in a while with Advair but I never noticed any other problems. I've stopped taking Advair for 3 days now. I feel like I can take deep breaths again. I also feel like I'm going through a withdrawal. I've had an intense headache. I'm sure it will go away. The big test will be over the next week. I'll see how I feel when I'm training. I'm not sure if my Asthma is bad enough to take medicane but I'll see. I'll keep Albueteral close by just in case. I'll post again in 1-2 weeks.