Can I suggest that you contact your assigned nurse , if you have one, and ask for a copy of the letter sent to the gp from the hospital. That should give you the definitive information regarding testing. Or , failing that contact your practise manager and also ask for copies of the hospital correspondence again, that should tel, you exactly what was written.
Good luck, I found emailing the nurse was easier than trying to get her by phone and also , I had a record I would cc the email to PALS