What are the symptoms/what can i do.?

I have asthma.. ... it seems like in the last 4 days its gotten worse... as of this morning, i could not breathe.. My lungs last night felt like they were "deflated" especially the left lung.. So i would like to know.. it it really my asthma? its never been so bad that it dang near killed Me, But i have gotten pnomonia.... & almost keeled over.. so what are the symptoms of pnomonia... & emphysema? what are those symptoms... how can i be sure if i have or dont have either or.. Im coughing till i throw up, gagging.. my Lungs feel deflated & yes im on oxygen at night due to how low it is while sleepong.. but ive come to the point where if i use my oxygen tank (hose goes in the nose) all day.. im at least a little better.. until 2 minutes of taking it off.. then its back to coughing all day, & that drowning/deflated feeling.. its not that im short of breath... i litterally cannot breathe! So.. i need to know if it could be just plain asthma, or pnomonia, or emphysema...... i cant call dr. till monday..... thanks btw..... this is all day every day now not just at night