Hear a squeak sound when I breath in

This has been going on for about 4 years. Doctors cannot figure it out. I can hear a wheezing/squeaking sound when I breath in at times. When I listen w stethoscope it is very loud/high pitch usually only on inhale. i don't have a cough and I feel fine. But this is happening more frequently so I am getting concerned. Does anyone else have this?

It sounds like snoring it happens from certain conditions and breathing spaces. I believe that it stems from unseen particles that affect breathing like dust and bad air. Examine the conditions of the place you are breathing in when this problem happens.

It is not snoring.