Honestly I'm actually glad he didn't go for the obvious Nick and Bella because this helps fracture the core six, and Christie might actually not use her DPOV here if she doesn't think she's potentially the replacement.
(I generally try to avoid reading result-related live feed spoilers but I'm so over this season already that I'm doing it).
I haven't read on it so I don't know if she's worried, but given that she's the one that blew up Cliff's game by eavesdropping and telling others, I'd say she probably is worried. Like she can't possibly be that paranoid about Nick and then be "oh nah, i feel good" with Cliff, lol. ---