I'm hopeful for some reassurance on this one! On 8/9/15, I brewed the following recipe:
9.5lb Maris Otter
1.0lb Chocolate (malt)
1.0lb White Wheat
0.5lb Black Patent
0.5lb Crystal 120L
2oz of hops but that's not important.
1 packet Windsor Yeast, rehydrated
OG = 1.059 (68%...
1.070 is a fairly big beer. I had a 1.064 drop gravity for over a week. I think you're fine, just give it some time to do its thing and clean up the beer for you.