When we had Ellie spayed recently, the vet recommended restricted activity for about 5-7 days. We have stairs in our house and carried her up and down for the first 5 days. There were a couple of times that she either really had to go out or really wanted to come back in and shot down or up the stairs on her own. I'd just take it easy with her and ease her back into the stairs after a few days. Maybe carry her the first few days and then slowly add in a flight each of the following days until she's back to going up and down them like normal. We also would pick her up when she wanted on the couch or in the recliner with one of us. I'm sure she'll let you know when she's feeling up for it though. I'm guessing that there's no elevator that could be used?