I too was the same nervous wreck before my baby was spayed....I think those who have gone through it have all felt the same.... When I brought my baby home the same night she was very sleepy and throughout the next day...I just planned on this is time for me to veg out and watch alot of movies while she rested on my lap.  It didn't take her long at all to get back to her old self...and the onesies were a great help...I was home for the whole week with her so I could keep an eye on her so she didn't get too active...she did just great...Sending prayers for a smooth easy spay for your lil one 
