If you can enter the US, you could enter Canada through land border without a PR card, though you'd need to check which documents you need for this. Edit: there are some extra conditions for this, like you cannot enter in a public vehicle.Sorry to bother you again, but what pr card doesn't arrive in the mail by Canada Post? Than Im stuck back home and can't come back? Please advise.
Otherwise, you can apply for PRTD from outside of Canada; it might take between several days and several months, probably depends on the country. Not the most ideal situation, but you should be able to return eventually.
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