Gravity too high for my yeast?

First off....I didn't make a starter...I know, I should have at least done this.

Anyway, my OG reading was 1.068. I wasn't sure what I was shooting for because it was a spontaneous brew, and I only had the Northwest Ale wyeast smack pack. On the pack it said the yeast is good up to 1.060.

I checked it this morning and the airlock was slowly bubbling. I know you have to be patient because sometimes it takes a while to get going...but since I know I under pitched, is it a good idea to go to the LHBS and pick up another pack of yeast?

Thanks!

Its already actively fermenting and you were just outside the range... It'll be fine as is

I'd just let it go, and then be sure to make a starter and/or pitch the correct amount of yeast in the future.

Agreed. It's already working so as the Beatles say "let it be". Next round... Wash the yeast and pitch a starter.