Very relaxed for the wedding as a guy and my fiancee is freaking out

Haha, It's a right of every girl to panic over small things and I think it's cute!

Divyam,

don't let her feel alone in this. Talking from my personal experience, I used to get super annoyed at my fiance when he failed to be empathetic. It is really stressful to plan a wedding. Just talk to her whenever she needs you to or she'll make you regret it later hahaha

Believe me, I am making my FH pay for every bit of it

There is no harm in being relaxed, just make sure that you are there for her as an when she needs you especially when she is completely psyched out with last-minute goof ups and last-minute preparations

At this point, she would love your attention and support over everything else.

And,

as for the checklist for you is concerned,

check this out, this offers the last minute things you must follow in time for the big day.