One of the main triggers of Asthma is allergies thus controlling the allergies will also cut back on asthma if your asthma is triggered by your allergies. Taking the singulair on a daily basis should help with the # of flare ups you are experiencing from the allergies. It is not uncommon for a person with Asthma to be on Singular (or Accolate which is the same type of drug) and Advair (or any combination of the Flovent/Serevent inhailers that are in Advair). It sounds to me that your doctor does know what they are talking about. I would take their advice to see if it helps and go from there. Singulair can take several weeks to kick in before you see the results but you have to make sure you take it.

Good luck & welcome,
Amanda