So I've Felt Sick Recently, I've Been Coughing If I

So I've felt sick recently, I've been coughing if I try to breathe in too much air, coughing just anytime, my throat was very sore, not so much now, and today I coughed and I felt something in my lungs, so I purposely coughed it out and it was this big yellow blob, it flew straight onto my bed, usually a liquid would seep straight into my bed but it stayed in contact for a while even after I went to tell my dad and I cleaned it up. Now I am constantly coughing them up on purpose but there not so big, but they keep coming. What's going on?