In response to the original post - you can end up doing your QXC again even if you don't "muck it up".
After two legs of my QXC a phone call home revealed that the crosswind had blown up to something which, while just within the aircraft limits, I wasn't very comfortable with.
After a thoughtful cuppa, I abandoned the attempt and an instructor was despatched to accompany me home. As it happened, I coped with the crosswind landing just fine, which made the episode even more irritating and embarrasing.
Re-doing the QXC wasn't a problem, I needed the solo time anyway. Also, over the next few days, *every* instructor at the club took the trouble to tell me they thought I'd made a sensible/safe decision, which made me feel a lot better about the whole episode.