The funny flavor could be the glue and label gunk. It could also be the ingredients/kit that you used, fermentation at non-ideal temps, etc. If you have a friend who brews, or a homebrew club, give them a bottle. They would figure it out pretty quickly. One of the side talents that comes with brewing is we become really good tasters
Is the bottle fully carbonated?
What was used as the "sanitizer". Your kitchen sink is one of the nastiest bacteria-laden places in your whole house. Consider picking up a "vinator" and bottling tree at some point to make the cleaning/sanitizing job a lot easier.