I think that the most difficult part of going back to work will be leaving my son at daycare. I am used to waking up at early hours, so that won't be too much of a change. But seeing my son less during the weekdays will be a huge transition for sure, for both of us. I have noticed that he now realizes when I leave the house or leave the room, and he clings to me more. But being around other children his age and interacting with them will be good for him, and I am sure that he will get used to the routine in no time.
In the meantime, I will enjoy every moment that I spend with my son during the day!