I think it’s safe to say no on this one. There’s no time limit. It can remain a shock to the system for quite some time.
I tried really hard to have a good day today, but towards the end I couldn’t walk properly and I was struggling with my vision and breathing. I couldn’t think. I came home and looked in the mirror for some visible sign that I was well and truly “done for”, but came away dejected because I see what everyone else sees; someone who visibly looks healthy. It’s really frustrating. 😦