I Have Copd , My Breathing Has Been Not Great

I have copd , my breathing has been not great , but o.k. , last night my breathing started getting short until I could hardly get a breath , got spots in front of my eyes , got sweaty , I almost passed out , got out on my doorstep feeling just awful , breathing bad , couldn't get a deep breath , just little short ones , have never had that before , and after a few minutes I felt sick and threw up 5 or 6 times , after that I slowly started getting a little better . I am still not breathing as good as I was before this happened .... setting down , if I get up quick , I get a bit dizzy .