How do I get into a realistic routine?

[cr1479]

Can someone please offer any advice? I have my DS who is 7 years old and my DD who is 2 weeks old.
She currently will only sleep in our arms so me and my OH are taking it in shifts. He's the only reason I get any sleep. I've tried her in a Moses basket and one of those nests, she just wants to be with us.
I do co sleep with her but she's a loud sleeper and will wriggle around so I wake up often.
My OH has done the school run since DD has been born, all the cooking and cleaning.
I know that she is still so young to be in a proper routine but I'm really worried about how I will cope when he goes back to work in 2 weeks.
I don't know how I will get enough sleep when he isn't here to stay sane, look after DS and do the school run by myself.
Can anyone please offer any advice on how they coped/what you did.
I'm really worried about it as we are barely just getting through the days now.

My DD is 6 months and DS is 9 so have a similar age gap.
My DD is also just like yours sounds, only sleeping on me etc. I think co sleeping if a good idea and just go with it if you can, they do grow out of it.... my DD is getting better (although is on a wonder week which is a challenge!!). Could you DP do the evening so you sleep when 7 year old goes to bed and then you take over 11-12ish if DP has to work? At least you can get 7yo to bed and get a couple of hours yourself. I bought a baby carrier too, DD went in this when hoovering, cooking etc and was (and still is sometimes) a life saver.
Sounds insurmountable now but you will cope, your routine will establish itself.
Congrats on baby

I have a four yr old girl and 5.5 month old too. My baby is similar to yours in she loves to be close to me and carried all the time. I feed her to sleep and co sleep too. I can honestly say my life saver has been her baby sling/carrier. She naps in it and comes with me to the shop/school run/dog walk etc. She hates her pushchair and will not sleep in it or the car seat. So it really is my life line and keeps me sane. I spent the first few months trying to get her to sleep in her crib or drift off in her pushchair or in the car but the only thing that works is the sling. So I go with that. Good luck, you'll settle into your own routine and find what works for you.