I'm going to suggest something that is probably difficult to hear. On reading your post it seems like you like to have control over all things in your life with too very high standards.
You can't continue like this - it's not sustainable and certainly not how most people live.
It certainly not sustainable with a baby/small child - it will affect your mental health.
You need to re-evaluate your life. Does work expect you to work 60 hours (ie 20 hours unpaid) per week? Or have you put this pressure on yourself? Another promotion will come along - will another IVF cycle? What is your priority?
Cut out excersise for a bit - your body is tired and needs some respite. Be active and incorporate more gentle exercise into your life (walking more in your day to day, cycling for food shop etc).
As for your home. It shouldn't get messy with just 2 people - it doesn't and shouldnt need be a show home.
Your friends will understand if you tell them you're struggling.
I'm saying this as someone who was similar to you pre children (albeit without IVF).
Be kind to yourself and dip out of high standards for a bit.
Book a day AL, do NO housework, have a nap, chill out in a book shop, followed by jacket potatoes for dinner. I promise you'll feel better.