I agree with goolarra that we're all affected differently and it might not be a good thing to rock the boat. I'd try to get the 3 pills, if possible.
As goolarra said, maybe a local pharmacy will just give you the three pills to get back home on. I guess there is a plus to using national pharmacy chains; unfortunately, I don't, but I do make sure I get all my scripts refilled before I leave for vacation.
I think different people react differently, and some of us are not as comfortable rocking the boat that way as others are. I found myself in a similar situation once when I was on vacation in another state. The local pharmacy there had told me that they would give me a few pills to get home on if I had my prescription bottle with me (I was using a pill minder and didn't). You might try that.
dont worry, i take 200mcg daily, and two times i had to stop taking it for 6 weeks!
of course, first 2 weeks you dont feel it, then the struggle starts (cramps, constipation, dry skin, swollen face,very low calcium level). but in your case, dont worry, your dosage is not high, and 3 days is nothing, trust me. Sometimes i forget to take it for 2 days, and absolutely nothing happens.