Unhelpfully, it depends hawthers, and depends on not just the job, but you, where you're at, the kids, their needs, your DH, etc.
It may be that you just need to give it a few weeks until - my most used phrase- it becomes the 'new normal'. It may be as Xiao says you need to look at flexible working. However, it may be that you now feel you want to completely change or give up work, but don't know if that's an option for you?
I was fine with it straight away when DS was 4.5 months, but it's such an individual thing.
DS has one big toy from us for his birthday; the others from friends and family he'll probably get as extra Xmas presents this year. As family are so far away, but we're visiting them all for Xmas, we'll just tag it on. We're asking for his birthday cards to be sent here though!
And yay for Freya and her poking tongue MissRee! I find it brilliant when DS pokes his out, which is crap of me, but I do encourage it back 
So sorry to hear about the woman at your class seven, how sad. Was it her first?
How's DS today BJR? Have ((hug)), you and DS really seem to have been through the wars recently.
And good luck mopsy. I hated, hated, HATED, at the end of an essay, doing all the bloody pagination, references, making sure the references were in the correct format, etc, etc. Takes for bloody ever and is sooooooooooooo boring. Do you think you'll be done by Xmas?
Success here, by total chance, on the outfit front. Went to our local Mothercare, and they only had the elf and Father Xmas costumes. Grumbled, but on my way out I noticed something, grabbed, and there it was! One Xmas pudding outfit, and in DS's size
. The staff told me that they'd never stocked that line, but that a random person had returned that one outfit to their store a week ago for a refund, and they'd just put it out.
My little pudding was meant to be!