I Woke Up Last Night Completely Out Of A Death

I woke up last night completely out of a death sleep trying to beathe; I was taking in deep breathe and nothing was going into my lungs. every breathe I was taking still no air, tears were streaming down my cheeks and I was panicing; I was home alone with my dogs and was trying to slow down and take smaller breathes but I kept thinking that I needed to calm myself so I could breathe. I have never been diagnosed with asthma. it seem to take forever before I could finally take a deep breath of air and when I did I started coughing. ihave been diagnosed with fibromyalgia, anxiety attacks, depression, and I have some back problems.