What kind of Illness is this?

Hello, so for the last 5 months my throat has been scratchy every now until and 2 months into that 5 month period I developed a cold that lasted about 2 months. Since then my right nasal closes it gets clogged to the point where I can’t breathe in or out through it. It happens random hours of the day but mostly at night time. My snot was a bright yellow this morning and when I had the cold. It went away for about two weeks and now it’s back and my nose is running all over again. It’s really irritating cause it stops me from sleeping it gets so bad. I don’t have insurance so I can’t go get checked out but any insight would be grateful. Also I had a dog that I thought I was allergic to I got rid of the dog and this is till happening. it happens only to right nasal my left nasal is good all the time.