Thank you all for your reply. Amo, my brother passed away almost 10 years ago.
Wknight, thanks for the comforting words. There are many doctors that just treat GERD without the test, in fact, I had 3 doctors, but the GI doctor said they should have done it a long time ago specifically because of the family history and it's been 3 years.
I hope everything will be fine with my test. I'm anxious about this!