hi kyla
my twins were born 10 weeks eariler and my son weighed the same as your son - 1402g. Yes you are right about it being 2 steps forward, one back. It is so hard leaving your child behind, but you know that he is in the best place. The best thing i can suggest is to involve yourself as much as you can. When you are there see if you can change he nappy and give him his gavage feed. Also, don't be afraid to ask questions . In the end my DS saw so many docs and specialists that the info was overwhelming and sometimes conflicted with each other. So we got his pead to gather all the medical results and run through them with us. Made it easier to digest.
Also if babysitting is a issue, why don't you see if you can go in at night when you DD is asleep and you can have your partner watch her or a relative watch her whilst she sleeps. Then there is no stress about babysitting. I also found that going in late at night the nurses were more relaxed and more open to showing you or giving you more opportinities for kangaroo cuddles. What hospital is your son at?
good luck and if you have any questions - please feel free to ask away