Think it always seems daunting doesn't it?
You finally "get back to reality" when DH goes back to work,and it seems scary!
I remember it well.......
All those things you did before with DC1 without thinking,you try to imagine doing them with 2 DC's!
Bathtime,Shopping,Going to the Park etc. etc.
I just remember everything had to be planned really well,as its more difficult to get things you've forgotten,with a LO in your arms.
It is daunting,but with each thing you do,you realise its not so different,just takes a little more time,patience and Equipment!!
At the end of each day,you feel like you have achieved a great deal,just getting through your "normal" day.
Try to take time for yourself when DH is home,I think before when you only have one,you try to keep going,but with 2 DC's I think lots of Dad and DC's "bonding" is required,so Mum can go and do some relaxing to recuperate.