Hi @sunflower1906 - I think we cross posted. I absolutely get what you mean about not wanting to engage emotionally. I feel like that. I won't harp on about issues with my clinic, but in general, I feel quite dubious about the way some clinics try to push people to feel celebratory and excited - it's quite natural to want to just keep your head down and not get your hopes up. There is no evidence that positive thinking, or any of that nonsense, makes a difference, and it makes me so cross when people imply that if we're not being full of rainbows and smiles we're somehow doing it wrong.
But, 11mm is great! So even if you don't feel excited, that's a plus point to tick quietly on your mental list of milestones.
Don't quote me, but my understanding about the day 5/day 6 thing is simply that an embryo that reaches its milestones on time, is more likely to be a healthy, strong embryo. So if it reached blastocyst stage at day 5, it is a day 5 embryo. Thawing and re-freezing may come with their own costs (but obviously they'd tell you if the embryo had failed to thaw and re-freezes so I expect you can discount that!). But a day 5 embryo is still a day 5 embryo.
(Can you tell I couldn't sleep last night and skimmed far too many academic papers?! And I'm not remotely a scientist so it's not even as if I understand them.)
Steroids - YY, not loving them. I feel very sick through the day, which I mind because it feels like early pregnancy sickness and I have to remind myself it's not, and I find the mental effort of that hard. Otherwise they're not too bad, but I am very careful about eating a good protein-heavy meal before I take them, or I do really notice.