The environment could indeed be an influence. If this is really bothering you, I highly recommend you to
visit your doctor for advice on how to deal with the situation you have right now. If it's true what achievinggrace is saying, you should indeed ask your doctor more about which inhaler you should use or if there is any other way to deal with your situation. Don't forget to take enough rest, because if you have asthma and you've noticed that it is becoming worse over time and don't take enough rest, you will make it even worse for yourself. Also, your doctor's advice is critical. So if you notice any increase in symptoms of asthma, go visit your doctor!