We all have had concerns, and we have all asked is it fine, and usually the answer is yes.
You can't make yeast do what you want them too. If you are concerned take a gravity reading. Or just wait for a few weeks.
As for the Champagne yeast. This seems to strip the apple flavor out for the first 6 months. Then freakishly the flavor will come back. Go ahead and drink it young, but do yourself a favor and save some for a year and see what happens.