Feel better!
As for affecting O, I'm not sure. I got the flu 3 days before I O'ed, but it hasn't been long enough to really know what a "normal" cycle is for me...look at this month - I haven't O'ed yet and I should be so either my cycle's going to be longer than the last 2 months or I won't O...sorry I couldn't answer the question!
As for looking after 2 kids and being sick...I have no idea how anyone does it, they just do. Feel better soon.