First brew, using Mr. Beer's American Porter hopped LME. It's been fermenting for 7 days, and the aroma has changed from yeasty to more like alcohol and kinda sweet smell, like Robitussin cough syrup. Is this OK, or is it a sign that my batch is tainted? I plan to taste it in a week or two, before bottling, and if it's still too sweet, can I dry hop it for a week or so to balance it better? I like malty beers, and don't care for hoppy ones like IPA, so I wouldn't want to make it too hoppy, so maybe I'll like it the way it is after bottling and conditioning?