Sorry that this is a little off topic for the forum but I couldn't find a more suitable spot for it and I appreciate the awesome wine brains around here to offer quality advice.
I make wine and beer and cider often. My girlfriend, however, doesn't drink but I'd still like to make something...
The only reason to measure with a hydrometer now is to check whether fermentation is complete. From now on, always check and record the original gravity of your wine before you pitch your yeast.
You've already put in this kuch time and supplies and it sounds like your committed to seeing it...