Thanks for your additional feedback. Here's my update for anyone still following along...
DS 4yo is scheduled to start at a montessori school June 16th.
DS 14 months is scheduled to start daycare July 4th.
I am on vacation June 20th to July 4th.
So we'll let our nanny go on June 20th, and provide her with a weeks paid vacation, plus 2 weeks pay in lieu of notice, (both of which are a little more than required by law here based on her length of service). I actually know a few people who would like to hire her as a housekeeper, so maybe she can get something right away. She has friends and family nearby that she stays with on weekends, holidays, etc. so I am not concerned about where she'll go.
So basically I just need to make it through to June 20th. *sigh* Until then, DH will be home with the kids and nanny in the mornings, I will be home one afternoon a week.
Now I'm getting stressed just thinking about the morning "out the door" routine, and the dual drop-off and pick-up, (both of which I'll be doing on my own). I have to start packing lunches, labeling clothing, getting "indoor and outdoor" shoes, aye-yaye-yaye! Next thing you know, I'll be on here b*tching about how hard it is juggling working and daycare!
DH is completely miffed that I am putting my 14 mo old in daycare. But I just won't trust a nanny again. I know I won't. I was so impressed by this woman, and I see what an act it is, I just won't believe it no matter how nice they are.
But given our home, location, etc., I feel really good that - knock on wood if we can get through all the fevers, germs, viruses, etc. - that this is for the best. Thanks for everyone's support. Sometimes just getting it all down on paper helps sort it out in my head!