XC Stagecheck tomorrow morning, feeling unsure but confident?

Tomorrow morning I fly my XC Stagecheck, i feel confident in my ability to do good, i feel good in my knowledge and my ability to answer questions, and ability to fly the plane (but not with what comes next)

Looking at the forecast for tomorrow morning, at my cruising altitude, the winds are predicted to be pretty much a straight right crosswind at 20 knots. Now i haven't flown in much crosswind, and definitely not in wind like 20 knots.

Ironically one of the questions i'll be asked tomorrow is going to be "what are the 5 hazardous attitudes"

I feel like i may be falling into one of them if i choose to fly, realistically, i want to cancel, but i also don't want to be an asshole and cancel at midnight my time, I know I should have been looking at the weather, but I was irresponsible and putting 90% of my effort in making sure I was knowledge proficient.