You will have to store the milk... freezing it. I don't know that if in a fridge, the milk will last for 5 days.
Try looking up milk storage, online. It is perishable.
Next, if you do find a way to freeze/store the breastmilk, how will you get all of that home? Are you flying? Check with the TSA rules on it.
http://www.tsa.gov/
And, ideally, pumping more than just once a day... and your breasts may get engorged.... so you gotta pump it out, or self-express it out in a shower, but it will go down the drain.
Perhaps too, your breasts may leak... so have breast pads.
There are electric breast pumps, or hand pumps... so you need to research that. Some may not work well....
And, if using an electric pump... be sure to get an outlet/voltage adapter because the USA and foreign countries do not have the same voltage or outlets.
next, once baby comes, you may not want to leave him/her for a trip.
And depending on how your baby is doing with intake, feedings, and nursing and IF he/she will even take a bottle.... these things can't be predicted.
Sometimes, if only using a pump... some Mom's milk starts to produce less, or dry up.
Here's a link on milk storage:
http://www.google.com/search?hl=en&client=firefox-a&a...
http://www.google.com/search?hl=en&client=firefox-a&a...=
http://www.google.com/search?hl=en&client=firefox-a&a...=
Just some quick thoughts,
All the best,
Susan