possible PAH?

[xers]

Hi I just came back from a Echo , My PAP is 45mmHg .  Last 3 years it was around 35, 25, 30 and now 45.
I also see grade 1 LV Diastolic dysfunction . the LV ejection capacity is 65%. But rest all normal. According to cardio, everything is ok and dont have to worry. But for PAP i need further check up with Pulmo.
I am 44 and a former smoker for 15 yrs . I have done PFT last 3 times and last year my capacity of lungs for 72 , but all 3 times showed restrictive . I did an CT of my lungs 4 years back when this was noticed first time and all was normal .
one year back, I was diagnosed with sleep apnea and I am on CPAP since then and my AHI is below 5.  I dont feel any breatlessness and I go to Gym atleast thrice a week

My Mom had ILD and passed away few months back .
I am worried and concerned if I have any PAH .

Any advise /suggestion would help