I don't know anything about pulmonary hypertension. I know that when you faint and it has something to do with your heart beating too fast or beating irregularly, you definitely need to get it checked out as thoroughly as possible.
I am so sorry that you have to worry about your medical bills. you won't know id it isn't neccessary or not. you are better to be safe then sorry. something could be mold right now, but get a tad worse over the years.
I hope things are okay for you.
I am on the opposite situation as you. my son has symptoms and I have great concerns and keep giong and keep going to the doctors only to get no where. just be thankful your doctor wants to follow up with you a tad bit closer
michelle