Welcome to the Forum! How long will it take? A very very good question! You have Burgos, León, and Astorga waiting for you - none should be flashed by only because Santiago is calling. You fall in with some very friendly pilgrims people you don't want to lose b-u-t they might walk faster than you or slower than you are accustomed changing your day itinerary. Blisters, as well as those on around or under other blisters may be a factor, Achilles of hamstring - sprains twists or just plain sore feet?, a bit of funky choriso or tortilla española resulting in Boabdil's revenge could lay you up for a day or two or more, several days when rain comes - “the windows of heaven and the fountains of the deep are opened” causing you and your all to be soaking wet, there are so many issues which could interfere with even the best of plans. Better to give yourself several extra days which if not used may be spent in Finesterre or better Muxia. Buen Camino!