Congestion in pug

Our baby pug (8 months old today) had surgery one month ago for his elongated palate and his stenotic nares. He was doing great the first couple weeks after surgery (I would actually have to check if he was breathing because he was no longer gasping for air and his chest no longer "bounced" while breathing). The vet told us without the surgery he would have died. After the surgery he was a whole new puppy. But, this past weekend he started getting a little congested sounding. We took him to the vet and he prescribed some antibiotics for him, but said he is concerned that he is congested this soon after the surgey and thinks there could be some other issues with him. He recommends we take Jake for a CAT scan and scoping. He thinks it could possibly be an autoimmune disease or even something else (I can't remember what he was saying he gave us so much information) - a mis-shapen something with his nose (something that could only be detected with the CAT scan and scoping). He said that if he gets congested again after the antibiotics, we definitely recommends getting this done. My poor little puppy is only 8 months old and has already been on antibiotics like 3 times (not including after surgery). He said if it is the one thing we might have to take the puppy to University of Penn or even NY (we live in PA) because there are so few vets that do that type of surgery. And they could even say they don't recommend the surgery for him. I feel so bad for him and am so scared that something will happen and we will lose him. Has anyone else had issues like this after the palate and nares surgery? Thanks...