Sorry to hear about your horse FedUp, losing any beloved animal is hard, especially when having been in your life for so long.
I went on a 13 hour flight on my own with DS when he was 6 months old.. Friends thought I was mad, but to repeat what others have said the life you lead with your baby is your choice. It depends on your personality (and your baby's to some extent.. Especially when they get older). It was hard work but manageable.
I have insisted on middle names for my children as I don't have one, and have never liked my first name (which is 1 syllable so cannot even be shortened.. ). My parents did that on purpose so others couldn't shorten/change my name,etc.. It would have been nice for me to have a choice though, which is what I want to give my children.
Goats, I also had a meltdown yesterday, though mine was more 'what on earth were we thinking in having a second DC!' DS is really hard work at the moment, and at 2.5 years old has started pushing over heavy furniture and throwing things when having a tantrum. He has major speech and language delay so has more frustrations building inside him than most toddlers as he can't make himself understood. He has also taken to waking up at 5.30am every morning, refuses to stay still for nappy changes (not fun when trying to deal with changing a poo filled nappy when he keeps rolling onto the carpet or trying to run off and climb onto beds.. It's a battleground and exhausting... Not sure how I'm going to introduce a newborn into the mix, deal with the sleep deprivation, and look after a very demanding and active toddler who doesn't listen or do what he is told.