Terrified - PSA test for my dad

Hi all,

Like many of you, my family and I have been through the ringer a bit with cancer as of late.

More recently, my dad (63 years old) has been getting a pain in his hip, so he went to the doctor and she prescribed strong pain killers and attributed it to sciatica. 

The pain didn't go away, so he went back again. She recommended a PSA test. I guess to see if it's prostate cancer?
 

The wait until the blood test is 1 week and I'm terrified. In the past, when I've thought it was cancer, it always is. My main fear is after googling and checking forums, sciatica is for final stages and I don't think I will be able to carry on.

Please, any advice would help greatly. I can't eat or sleep. 

ps sorry I've not used this forum before and not sure where this post should live?

Nancy x