What Does This Pulmonary Function Test Result Indicate?

Question: I have taken 7 pft tests over 15 years. They always have the same or very similar results. Fvc 100-105, Fev1 94-102, fev1/Fvc 73-78, fef25/75 changes up and Dow 90-49-59-69-62. After bronchi test fef went from 72 to 99. Rv 103. Tlc 114-117.
I was given the diagnosis that I have very mild asthma.
I have gad and I let the disorder question the results and to let stress mediators continually release inside so that I never am sure.
The last pft was Fvc 112 fev1 98 fef25/75 99 after bronco test rv 103 tlc 112
Since the pft test is a forced test. You are forcing the air out. Can some readings be off. Specifically the portion that tests air trapping like rv. My rv is low. But I give a very hard effort for the entire test. Could my push expell any reserve air or is that particular function to measure rv not a forced air test. I feel as if I have air trapping and wondering what measures the rv. Tlc.
I am an ex smoker. Quit 16 years ago. Three years ago, my 91 year old mother died from copd. I watched her for the entire time she was ill. I worry that I may end up with it. My question is two fold. With the results shown. What do you think and the other is the air trapping question.

I have chatted enough for now. I will let you think of this