Oh dear lord. Another 42 year old knocking on the door for membership. I hope not.
Welcome to HW jetshack. As others have said, sorry you have felt the need to look us up, but hopefully you will nor require full membership.
I know it is easy to say don't freak out, but it is hard not to. I was there only last year.
I thought it strange that your doctor felt the need to check your PSA at your age, but then I see there is family history, so very prudent of him to keep an eye on things.
So you don't ride a bike and your wife is pregnant (congratulations) so I assume there is no sexual activity between you at this point. That said, just plain old self pleasuring (not allowed to use the M word) can give a raised PSA reading. Do you run? That is another thing. I am also wondering what the time scale was after your DRE that your blood was taken. Some say 7 days, my doctor likes to leave it for 2 weeks.
I am not saying it is but Prostatitis is another thing that can cause a very sharp rise in PSA, and antibiotics will often not fix it. It can be just as difficult to detect and treat as PC. Good thing is it cant kill you.
You have had some very good advice already and we have a whole lot more to offer should you need it, but for now try not to worry yourself and wait for the results of your further tests. Hopefully all will be fine, but we are here ready and waiting if you want us.
My advice to you right now is try and focus on the immanent arrival of you new son/daughter