Will you have any help after the 1st week?
I was able to take care of myself and do most things around the house but had a 10# lifting restriction for 6 weeks and that was the most difficult part. A gallon of milk weighs over 8#. Vacuuming or mowing is over the limit. Driving was not easy for a bit because of the seatbelt (the kidney brace helped with that) and turning to look but was manageable.
You won't need full time help after your sister leaves but if you have someone come in once a week or so, it will make your life easier and you deserve that!