Toddler Bed

I've read that you should make changes for a toddler several weeks before a new baby arrives but we did not do that and may pay the price for it down the road. One week before the big day, we converted Beck's bed into a toddler bed (he's 26 months old). He was so proud of his new bed!!! He immediately jumped in it and started covering himself with his blanket and surrounding himself with all of his stuffed animals. The first night was awesome...he slept in it until 7 am!!! He has not slept all night in his bed since then...What have we done!?!