I think newborn stage becomes easier - in comparison to later stages! But at the time with the first (and in my case only I couldn't have any more) it seems tough.
Everyone has a stage they find the most difficult, mine was approx age 7-9, that was partly down to issues dd had with a teacher (who was a bullying cow!) around this point too though.
Travelledtheworld so sorry for your loss 
Aftereights - dd needed a small procedure when in scbu, the scream when the cannula for the anaesthetic was being sited made me nearly pull the anaesthetist away! Exh had to physically hold me back! it was a visceral instinctive reaction!
Effyouseekaye (other usernames are so much cleverer than mine 😂)
I remember having a conversation with a friend similar to Ross in friends "I knew I was having a baby I didn't realise the baby was having me!" Moment - about a month before the birth having the ridiculous 'realisation' of 'oh shit! I'm gonna have to be someone's mum! I hadn't thought past dealing with pregnancy/birth there's an actual baby in there!' She had 4 and found it hilarious! Not in a mean way but 'yep wondered when you'd hit that point' 😂😂
JillCrewesMum - often we don't know if we have a sick/disabled child until years later but it still affects our and their lives. Dd wasn't Dx until high school (MANY years of trips to gp with what we now know were CLEAR indications but we were fobbed off, I initially thought dd was a combination of unlucky/clumsy).
SerenDippitty - I had 2 mc before dd, wasn't able to have more after, am very grateful I have her. I've friends who haven't been able to have DC or who went through years of fertility issues first, plus a few who are publicly 'child free by choice' but made the choice for deeply personal traumatic reasons. It's an awful comment to make and not one I'd ever make but I've been there when others have made such comments and winced (and in some cases jumped in to tell 'em to wind their neck in!). I'm very sorry for the pain of fertility issues it seems you are experiencing. 