Suffer From Allergies. When Blowing Nose, Have Huge Lump. Painful While Swallowing. Did Tonsils Removal. Suggestions?

I suffer from allergies and I have been having a lot of plugged nasal passage problems. Now, here is the gross part. Sorry for this, I was trying to clear my nose passages by blowing my nose, and forcefully sucking in air through my nose in my throat. While doing this I felt like the back of my throat balloon up and now I have this huge lump in front of the dangly thingy in the back of my throat. It is very visible in the mirror when I use a light to look. There is very little pain, but it gets in the way while swallowing (a little). I have no issues with choking or breathing. Will this thing go away or should I make an appointment. My tonsils were removed at age 4. I do not use tobacco. I am morbidly obese, though very good looking (fat guy humor). No other injuries or surgeries to my throat to note. OH! I also use a C-Pap at a pressure of 18.