I bottled my 1st ever homebrew bitter last weekend into 500ml bottles with one Coopers carbonation drop in each bottle (per supplier instruction). I know its only, been a week, but I thought it would be a good idea to make some tasting notes after a week of the secondary fermentation. The beer tastes quite nice, but there's no head at all, and only very faint carbonation sensation in the mouth. Should I be worried, or will the carbonation increase after further fermentation in the bottle?