I brewed this wit on 1/13/08. the starting grav was at 1.042. I checked today to see where it was and its at 1.006. It smelled good, like coriander, but then i tasted it and it is really bitter and tart. Is this ok? I noticed the airlock had stuff on it from the kraussen, it could have been plugged, not sure. the beer looks fine, alittle on the thin side, but its just really bitter. Is it just because its a young beer?