Psychological or not?

In the summer of 2024, I developed an infection that affected my lungs, and since then, my lungs have been rattling and whistling. Other people can hear it and are shocked because the doctors can't find anything. After the infection cleared, I still had these problems with my lungs whistling. I cough very loudly from time to time because I have mucus in my lungs. I have to breathe deeply all the time to get a clearing breath, and if it doesn't come, I breathe deeply until it does. I feel severe shortness of breath and feel like I'm suffocating. I went to a lung specialist, they did an x-ray, and they couldn't find anything. I'm now unsure whether it could be psychological.