As long as you wear modest clothes you should be ok, like no shorts or tank tops. Using a shawl draped over your chest which you can also wrap on your head if needs be is also good idea. Even then people will still stare so just get used to it.
Always let someone know where you are going and when you should be back, e.g. the hotel owner so if you don't come back they can do something.
I would love to go travelling round Pakistan, so I'm quite jealous of you. Have a good time and do come back and share your stories.