If your temps were on the warm side...then yep, it only took 3-4 days to complete. It's going to need tome time to mellow out since you added additional sugars and used champagne yeast. You can let it sit a few more days where it is...or you can go ahead and rack. Either way is fine. I'd give it a few weeks and taste it again. If you are looking to drink it sooner or are looking for a lower alcohol content, try using an ale yeast and keep your OG under 1.060.