Maybe an air purifier would help

I had really bad a battle with migraines for the past two weeks.  Something is causing them or adding to the ability for me to get rid of them, I am sure stress is the number one factor, but I fell as if there is something else I am missing.  I am wondering if i was to get an air purifier, say like Blueair, maybe that would help?  I do have allergies to mold and I know we are needing to replace our windows and wondering if its possible for some of that to be airborne and a contributing trigger to my migraines.  I have not had them this frequently since we left that house we were renting that had the black mold in the basement.  I try very hard to keep a log of when my migraine starts and possible triggers.  So I guess my hubby is going to check into replacing windows this year instead of waiting a year or two.  I thought we would try sealing and caulking the windows to get is through until we could afford the windows without going into debt over them, but if that is a factor to the migranes then maybe waiting is not such a good idea!