Wow, it sounds like you have a really supportive going-back-to-work environment.

I often work from home and have been doing so since my DD was 8 mths old. The hardest transition for her was when at about 20 mths I started getting a nanny in for two-three days a week. I was there almost all of the time, where before that she had been used to going to her godmother's for a day a week, completely fine without me. Having me in the house and not being able to be with me took her a good few weeks to get used to. It was harder for her than it had been when I left her. The bonus was that I got to spend time with her at lunch time and put her down for a nap and once she settled into the arranagement I was able to pop in and have a cup of tea and see her if I wanted to.

I know she was a bit older than your bub, but I just thought I would let you know that it was definitely a more difficult transition for my DD to get used to than me not being there at all. Of course, in the longer run it was so much better and she loved having me around and at hand if it was needed. She just needed time.