Mine's ok. I definitely get winded more easily, and I must have had a flare up one night, because in my dream I couldn't breathe, but nothing really out of the ordinary so far.
Sleeping with a humidifier helps since my nose is constantly stuffed up. So far, I've avoided using my inhaler because my doctor said I should only use it when really necessary and it hasn't been yet.
Me (31) Him (31) Married: 5/2013 CP: 9/18/14 (4w:4d) BFP: 10/16/14 EDD: 6/21/15
Mines flared up! It doesn't help that it's really cold in the UK at the moment but I'm getting breathless walking get to the shop or up the stairs! The inhaler has come out of retirement
Mine has gotten a lot more mild as I've gotten older, and I didn't notice it being a factor in my first pregnancy. But I've found myself catching my breath a lot more in the last few days (it also got down below -40 over the weekend which didn't help and our air is so dry now) and it just kind of hit me yesterday that that's probably what's going on. I was sick right at the start of my pregnancy and it took about 2 weeks for my breathing to straighten itself out again too.
Mine is pretty bad with this cold weather. I'm from AZ so the weather doesn't get super cold, but when it does occasionally, my asthma is awful. I've had to start advair on top of my albuterol.
Mine is usually exercise induced. I've been trying to do a mile minimum in the elliptical daily and that always sets it off. And cotton ginning season last month...
Mine is definitely worse because of the cold weather. So yea, when i walk outside a lot of breathlessness. And i have kept up with my daily symbicort per my midwife 's suggestion.... baby needs me breathing! Lol.... trying to avoid colds at all costs since it takes forever to kick....
Mine is better this trimester than last, but I still get really winded if I go up stairs or talk a lot. Not as bad when running as it was first trimester.
Mine isn't too bad so far, but not not as mild as my last pregnancy (wasn't really pregnant during cold and flu season). Last pregnancy mine seemed to completely disappear. Actually, that's true with all of my health stuff. Totally better last pregnancy, totally worse this one.
Re: Asthmatics....
Me (31) Him (31)

Married: 5/2013
CP: 9/18/14 (4w:4d)
BFP: 10/16/14 EDD: 6/21/15