Nb65988 - what ridiculous advice! You cannot strap two small children into their car seats and leave them downstairs while you get ready!
OP I feel your pain. I have two under two (17 months apart) and I never go a day without either shouting or crying. I start the day full of hope determined that today will be different and I will be a wonderful parent full of Mary Poppins esq joy and loveliness but then reality happens.
My youngest is now 5 months old and things have started to get better though. Your baby is only 3 weeks old and it takes time for the oldest to get used to the new dynamics and realise they have to share you.
I shower in the evening before bed as there’s no chance I’d get to in the morning. I organise my clothes the night before so I can just shove them on and I do my make up while the oldest is having breakfast as he is happily distracted by the food.
Babywearing was my saviour. I got a fabric sling and put the baby in that basically anytime they weren’t feeding. It meant I had two hands free to deal with the oldest and as the baby was close to me she was generally very chilled and calm.
Take loads of snacks everywhere you go. It helps to distract them and keep them still if you are out and about and need to feed/change nappy.
Also don’t feel guilty to plonk them in front of the tv. Cbeebies is your friend for now. And watching 20 mins of tv here and there throughout the day whilst you sort the baby or have 2 mins to yourself is not going to rot their brain. Also download CBeebies app on your phone for when you are out and about.
I have found playgroups really good and we are out of the house everyday. It entertains the oldest and also tires him out so he is much easier to deal with in the afternoons. Lots of the church run ones are cheap too £1.50 ish or free if you can’t afford it and you often get a cup of tea and a piece of cake. Plus regularly going to the same groups helps you to meet other mums. I don’t need new friends but I do appreciate a friendly face and little chat when I am at these things. Plus a bit of adult conversation can do wonders for your soul when all morning all you’ve heard is constant demands from the children.
And when everything gets too much I take the kids for a drive as after 10 mins or so of screaming they normally both fall asleep. I regularly go out for a drive just to get some peace and try and de stress without two demanding children competing for my attention.
Sometimes I feel like I will explode with frustration, tiredness, mental exhaustion and loneliness. It’s the hardest thing I’ve ever done but even on the shittest day the kids will do something that melts my heart and makes it all feel worth it.
You are doing an amazing job - even if you don’t feel like it. Hang in there.