I'm not exactly sure what you are claiming you screwed up on. 4 days is probably too early to declare fermentation is done (unless gravity readings have been 1.012 for several days, which would be a 24-36hr ferment) also the difference between a few final gravity points is not that significant, so don't sweat it (you should still end up with very good beer).
While I will say that in general 4 days is to soon to end the fermentation/conditioning phase, I don't subscribe to the more time is better belief. It's ready when it's ready. If it tastes good, its ready (assuming fermentation has stopped). That may be after 10 days or it may after 10 weeks, but once it is "ready" it really doesn't change significantly (not counting carbonation).
You have stated that it does not taste "weird" so my advice would be to take gravity readings for the next 2 days, tasting it each day, to make sure fermentation has stopped. If fermentation is completed, either bottle it and let it carb, or let it sit a week or two sampling it periodically to learn what the effect is. RDWHAHB.