I can completely understand your "lump", I have several : /. I am so happy to hear that it actually does not mean anything in early recovery period and it is good to know about that so thanks for posting the link : ).
May your PSA level completely disappear in following weeks : ) and than big celebration will be in order !!! How will you celebrate ; ) ? Or you will just open nice bottle of wine and relax watching a sunset ? Sometimes enjoying the simplest things is the best celebration of all : ))).