Thanks, i live puerto rico and i have yet to find anyone here that sells mead by the bottle. Should i add more yeast to lower the ABV?
Adding more yeast is certainly not something would lower the ABV - if anything you would get more alcohol, not less.
To elaborate - the final alcohol content of a beverage (ABV, Alcohol By Volume) is primarily determined by two factors. The first of these is the amount of sugar available for fermentation - more sugar means a higher
potential alcohol content. We generally measure the amount of sugar available with "OG," or "original gravity" - more dissolved sugars means a denser, heavier liquid, and we can measure the density of a wort or must fairly easily with a hydrometer.
The second factor is the alcohol tolerance of the yeast - yeast is far more tolerant of alcohol than most microorganisms, but even yeast can only stand so much alcohol before it stops reproducing. Fermentation will generally stop when the yeast runs out of fermentable sugar or hits its maximum alcohol tolerance, whichever comes first; the alcohol tolerance can very greatly depending on which strain of yeast you are using. A sweet mead yeast, for example, will quit at about 12 or 13% ABV, while a champagne yeast like Lalvin EC1118 (which I use for my dry meads) will keep on cruising up until 18%.
What kind/strain of yeast are you using? I'm not terribly familiar with bread yeast (i.e. storebought "active dry") but from I've heard it will probably cut out at about 12% ABV.
At any rate, 5 days is a very, very short time in mead land - brewing, especially mead brewing, is a craft that requires very high degrees of patience. You should allow, at
absolute minimum, two weeks for the primary fermentation. Mead has a tendency to ferment vigorously for a few days and then trail off slowly - this is due in a large part to the fact that honey is a mix of a couple different sugars, one of which ferments more rapidly than the other. Resist the urge to taste early - time is your friend here! I would probably allow at least another two undisturbed weeks for fermentation, followed by a good long time aging in secondary, or, failing that, in bottles.