That's great news! Maybe every time your mom gets annoying like that, you can tell yourself that you will soon be home and won't have to listen to her anymore. It's easier to bear these annoyances when the end is in sight. That's the passive "wait it out" approach. If you want to try a "rock the boat" approach, I guess you could just tell her point blank, "mom it really annoys me when you do that and I've told you before. Although you have been really helpful to me with my wound and I appreciate that, I am looking forward to going home so I don't have to listen to you nag me about chores." That's telling it like it is. Some people need to be bluntly spoken to.

Good luck.