I have been experiencing shortness of breath for 24 hours, and had little or no sleep last night. This morning my upper back rib cage area is painful and I can t breathe in any big deep breaths, overall my breathing is very short fast and shallow.... I think it may be an allergy but do not know what to! I am usually susceptible to runny noses and slight shortness of breath when I come into contact with dust, paint odour, sawdust but have not been in contact with any of these in the last 48 hours. I do have a dog.... could my reaction be due to this ?