I am writing it with teary eyes. So my DD1 is 3 and DS2 just turned 6 months. He is in this annoying stage when he can't sit unsupported but is too big for bouncer/activity gym. Anyway, apart from having to constantly hold him, he wakes up lots and hates sleeping in his cot, I gave up and co sleep mostly but I still wake up exhausted. Naps are non existent at home, unless he falls asleep on the boob and is held. Out and about he sleeps in the carrier or falls asleep in the car.
Anyway, to cut the long story short, I just feel so constantly stressed. I feel I can't give my DD enough undivided attention and it shows in her behaviour.
We used to have such fantastic relationship and since DS was born it's not the same. I miss being chilled out mama and having lots of patience. Just done bedtime, unfortunately shouted a bit because baby was screaming hungry and DD didn't comply with any calm/polite requests about getting in and out of bath etc.
The thing is, it's not her fault, i feel so sorry for her as I am writing this. I know this sounds terrible but I miss her and I miss there being just the two of us.
Just started blw with DS as well, with stressed me out too, he is not interested in anything, just flings food everywhere and makes terrible mess.
I wish I was a better mum for them both 
Thank you for reading my rant!