Have rested as part of my taper and did an easy 45 mins on the turbo yesterday and by last night my knee was pretty swollen. This morning its slightly less so but still some discomfort.
I am due to travel tomorrow and start my event on Saturday, looking at the stages I think I will be riding between 5 and 8 hours a day.
How swollen was it? And how painful, and how long did the pain last? If you had to look hard to find the swelling, and the pain went away after you finished cycling, you might be ok. If it was a noticeable swelling (someone else could see it without you needing to point it out) and/or it was a throbbing pain all night then a 5 day event sounds like a massive risk to be honest. Seeing as you’re pretty much already committed to it at this stage I would be tempted to go anyway, but it would be to participate only and not try to fulfil any ambitious time goals, and be prepared to have a sensible word with yourself and pull out if (when) it starts to go sideways. Yes, to answer your q, you can give yourself a really nasty injury if you just push through, possibly but not definitely permanent, but certainly with the chance of very long lasting effects, depending on how effectively the rehab goes