Should I retake the GRE? Got the opposite of what I expected

Just took the GRE today and got the reverse of the scores I expected from my practice tests. I usually get about a 165 Quant, and 160 Verbal, but for the official test, I got a 166 verbal and 160 Quant. I'm not eager to retake it, but I did a really bad job of pacing myself on the second quant section and could likely do better. However, I'm pretty sure that verbal score was sheer dumb luck, and that I won't be getting it again. My GPA isn't amazing (3.1), so I'm wondering if improving my GRE score is worth the extra money. I have some research experience, but nothing amazing.

I'm applying mostly to master's programs at some mid-tier to some high-tier schools. Some of them are in Canada, and I'm not sure how much they care about the GRE there.