I have a crushing chest pain making it difficult to breath?

I have a crushing chest pain that feels like constant pressure making it difficult to breath. I am coughing up phlegm which has sometimes had streaks of blood in it. I also got chills and then it goes into hot flushes. I am worried as to what this might be as It came on all of a sudden it is causing me to become very fatigued. I don’t want this to impact on my daily life as I have children to support. I am usually a generally healthy person who eats a variety of a diet.

General Information: No just anti depressants this has come on in last 24hours