Miss
What I would avoid doing is googling PSA scores etc.
You will in all liklihood read loads of rubbish. The PSA is an indicator. 19.4 is higher than normal but if you read some profiles on here you will see it pales into insignificance eg Trevor Booth was 12000 on dx.
I'm surprised that you are having to phone to arrange an MRI and bone scan the urologist should have referred your other half for these.
Anyway, it is easy for all of us to advise you not to worry but try to believe it does get easier and some sense of normality will return. In the meantime go on to the publications area of PCUK and read, read, read. Depending on the outcome of the next tests you may have decisions to make about treatment. Forewarned is forearmed
Take care
Bri