i just tried my first beer. it was a simple brown ale, extract, hops, and yeast with no grains and the flavor is pretty good. it was in the primary for about five days, secondary about a week and a half, and in bottles for 2 weeks and three days. like i said the flavor is good and i would be happy with this but it is quite flat. there is carbonation and a head(which dissipates quickly) but it is quite flat. i added 3/4 of a cup of dextrose in water to my bottling bucket and siphoned the beer on top of that. will it get more carbonated with time or did i screw up? i need help!