Horrible situation for you both.
The pain she is experiencing is unimaginable if you haven't been there.
If you possibly can, I'd seek the support you need for your tiredness etc from your partner/parents basically anyone that's not her.
Prepare yourself that it's going to be very difficult for her to meet the baby. Prepare for flakiness, rudeness etc. None of this is her true self. It's her coping mechanism and actually, it's there to protect her sanity.
You are about to have a marvelous new person come into your life. Yes, you will need support but please don't seek it from her. Even by expecting her to meet the baby or smile.
When I experienced infertility, I learnt that putting on a brave face came at an enormous cost to my wellbeing. Eg an evening spent with a friend and newborn would result in a weekend of sobbing and days of wretchedness and low mood. Stuff like that took weeks to recover.
You sound supportive, the needling about your house and your parents, that's not her, it's the pain speaking. (Unless she was always like this?)
All the best for your new baby!