You have made quite a lot of progress in a week! Remember that you just had both your hips replaced and now you are walking and moving around pretty freely.
I had trouble and weakness with lateral movement as well, and one side was worse.
Caring for a nursling is the wild card here. How much does she weigh? How often does she eat? (And that varies, I know. She may hit a growth spurt and want to nurse more often.) I wonder what sort of hacks you can come up with to make caring for her easier. It has been a while since I had a baby, but here are some ideas: 1) put everything up high so you don't have to bend over. That would be the changing table, the crib, the bath (or bathe her in the sink), any other baby supplies. 2) how to carry her. In a sling? One of those loose, large, cloth containers that allows for easy nursing? You could wear her all day. Once at home, could you have her sleep on a cart with wheels? It sounds crazy, but maybe you could wheel her around when you don't wear her. 3) help when you get home. You need your rest, too. Could someone come for a few hours in the afternoon or at night to help out? Feed baby expressed milk or bring baby to you to nurse? 4) how well is baby sleeping at night? Once you get home, you can focus on getting her to stretch out her sleeping periods. There are all kinds of ways to do this, way beyond the scope of this forum. (Like if you aren't sleeping together, there are strategies vs if you are cosleeping). Not sure it is worth working on this until you get back home. You may have to tough it out until then. Can you sleep upright in a chair at the hotel with baby propped up breast high on pillows? (My older child had a terrible time with change; away from home I had to cater to him while at home I could train him more). 5) does baby use a pacifier? How good is she at self comforting? If you are doing all this already, I apologize.