Lows and breathing difficulties

Lately when my sugar is going low I start having breathing problems. I feel like I'm not getting enough oxygen and even when I take deep breathes it feels like it's not all getting into my lungs. I have a doc's appointment on Monday but I was wondering if anyone else has had this problem. 

when i get really low i have trouble breathing too. It feels like i have to concentrate on breathing and make myself inhale. :(

when my sugar goes high it does that, it sometimes does it when its low.. but my doctor said it had nothing to do with diabetes.. i was tested for asthma and that came up negative.. they gave me an inhaler and said to use it when i need it..