Hiya @unknownscot - I'm about to have my second FET this week.
The best advise I can give you, and this is based on my experience, is that just to carry on life as normal. I can be so chilled one minute, then the next minute just anxious as hell! Thats because of the anticipation creating anxiety, not knowing the outcome.
My first FET I for some reason felt like I had to "rest" as I was worried to over do myself and ruin things. Well it made things worse for me, probably made my anxiety worse!
So this time I've been doing what I would usually do, the lockdown way. Cleaning house top to bottom, going for long walks, and just sort of trying to push it to the back of my mind.
I know everyone is different, so all that might sound completely the opposite of what you'd hoped haha! My first every transfer was fresh, I did myself in with work, because my job is sometimes pretty "on the go" (I work in office facilities so was always up doing something, walking to and from train stations etc) and my bosses at the time were shit and just didnt care! So I didnt allow my body to do it's thing.
The first FET(Referred to above) was in lockdown and I was so scared of what happened before that I relaxed too much I think! So this time I've just tried to "do me" if you know what I mean. Make sure I'm comfortable with everything that I'm doing and if I am doing too much, take a break. Luckily I'm working from home so I hope I never have an experience like my first again.
If you have any other questions let me know :) Sorry that I've reenabled on so much! xx