OK, there is no reason to panic--none! You are a smart individual, passsed your undergraduate training, received your FE examination and passed and are now going for the PE. Let's put this in perspective-- you are a smart guy!!! You got through your undergraduate training, found a job, gained the requisite experience and are now ready to show the world that you know what to do. Now, I don't know if you went to Podunk U or Stanford--really makes no difference, you have an ABET accredited degree, the requisite amount of preparatory work and are now ready to prove to the world that you can become registered.
Recall that the PE test is designed to measure "minimal competency"-- are you minimally competent? I would argue that the answer is YES, you are minimally competent-- if you were not, your boss would not keep you. Recall that the test questions are designed to completed in 6 minutes or less--what this means is that rich and rigorous calculations are probably not going to be involved. Yes, there will be calculations, you have to remember the UNITS of the measure, however, you did this as a sophomore in college, you can do this again.
There is no reason to believe that you are NOT going to pass this the first time--you will fail if you think you will fail, conversely, you will pass if you think you will pass. Although there are only 5 days left before the examination, I would carefully review your material and work all of the problems that you can again. YOU CAN DO THIS.
If it were I, I would look at the NCEES test criterion, review what is supposed to be on the test and be damn sure that you can do all of those items. Now, some of them may not be on there, however, plan on all of them being on there and taking some time for review of the material. If you have studied well, this should not be difficult for you.
I was out of school 35 years when I took the PE--- now, I had extensive graduate work and upper level "C" suite management experience, however, no real down and dirty engineering experience in the last 30 years. You think you are spooked, I found this worse than my doctoral dissertation defense!!!! However, I planned on only taking the test one time and I did--and passed!!!!!!!!!! Sadly, I did not know that this board even existed until after I received word that I passed.
Plan this week very wisely---don't waste any time screwing around-- focus, focus,focus on this examination. On Thursday, close it up, get a good nites rest and then go to the test site--check into the hotel and be ready to go on test day.
If your wife has been your rock in this adventure--and this is what the PE test is, an adventure, then plan on taking her out to dinner NEXT weekend--someplace nice, not Golden Corral!!!!!!!!!!!!!11
If you unfortunately do not achieve a passing score--then we have October to worry about. However, I have all the faith in the world thatyou will do well on this test and not require any other test dates. There is no reason to waste money-- taking the test a second time is wasted money-- I have great faith that you will do well. Prove it to me!!!!!!
Good Luck, you will do well.