Our child had major separation anxiety until close to 3. We initially tried a small, in-home daycare when he was about five months (which I think for separation anxiety is actually easier than 13 months because they understand less) and it went very poorly. He was there for about 4 weeks and did not adjust well. We then moved on to a nanny, which was better for our family. But, I really had to hide in my own house on the days I worked from home. If he saw me when I came down for coffee, snack, lunch, etc., it made everything much worse for him and the nanny. It's hard because you want to be helpful and you don't want to hear your kid in distress, but it's really important you do not intervene. It's best if your child does not even realize you are home and accessible (which means perhaps you should go elsewhere to work for a period of time). Fwiw, my son's separation anxiety really improved at close to 3. We did a part-time pre-school starting at age 2 and he cried at every single drop-off the entire year (it was so hard), but at 3 he really seemed to turn a corner!