OK. SO my first batch of mead has been brewing for about 2.5 weeks. THe gravity is at 2.5 wich says it should be about 15 percent. Now i tasted it and it seemed a little bit carbonated almost. My recipe says it will only take 3-4 weeks. How do i know when its done? I am going to see my sister and rother in law on thursday and id really like to bring them a bottle, is there a way of knowing what the alcohal conent right now really is?