What Do My Pulmonary Function Test Results Indicate?

Question: I would like an opinion if possible. To be brief, I have Generalized Anxiety Disorder. I am an ex smoker, smoked for 22 years a pack a day smoker at the most. I quit 15 years ago. I have had a ton of stressful events disrupt my life including taking care of my mother who passed away two years ago. she was 92, died from copd.
I have taken 6 Pulmonary function tests over the past 14 years with little variation. I have been told by other dr's that i am basically fine but have anxious behavior causing my shortness of breath. I will post the summary results of the PFT tests here and try to make them readable. they are just the percentages results applicable to my test at the time.

Year     FVC     FEV1     FEV1/FVC     FEF2575     DLCO     TLC     DLCO/VA
2001     110     103     77     85     67     110     61
2001     108     97     74     69     64     104     62
2002     89     85     78     72     87     104     92
2013     101     86     68     49     70     102     69
2014     92     84     73     59     81     102     83
2014     114     103     72     69     81     102     83

Do you believe that anxiety and nerves can cause chest and muscles to tighten so much that after exertion the chest refuses to expand to take a breath in. I am on edge and constantly thinking of it. I have a RX for Lexapro and at 20mg not sure if it is helping.

I have no cough or fever. I sleep well Casual walking in fine bike riding fine. Never been able to run get winded on hard bike ride. No one with asthma

In 2001 I complained of breathlessness. My pulmonologist said it was anxiety.

My daughter is a respiratory therapist. Her opinion is an agreement of age and anxiety

Thank you. If I find a need to follow up with any other questions would that be ok with you?