Is this a nasal drainage problem or what need to know help?

I been for like 2 1/2 years now coughing up white mucus and my nose stays stopped up it is bad in the morning i think it is the worst then it really isn't bad at all during the day just in the mornings and my throat is a lil sore somtimes but goes away after like an hour and also if i get upset my nose starts running terrible and i cough up a super amount of mucus it almost chokes me but that's just when i get real upset does any1 know what maybe could be wrong with me