I wake up this morning, i have sore throat, light phelgm coming out from cough, and swollen tonsil...?

It feels like my tonsil, but my throat was SUPER sore until i gargled that warm salt water. But i cant find what my symptoms are on the net, no headache, my nose is NOT running but i am getting ALOT of light phlegm coming up from when i do cough, i been drinkin robitussin at work every 3 hours, so im not really coughing but when i do that phlegm comes out. And it feels like my tonsil is swollen, is this tonsilitis??? or what