Going to chime in with everyone else here about the antibiotics. It's been a well known fact for as far as I can remember, that taking antibiotics for colds does far more harm in the long run to your body then good. Not to mention having no affects on colds, either.
Now, for cold remedies, well ... there really is none. However there are things you can do to help your comfort level while sick, and even help your body fight it off better. People already recommended getting rest and taking your vitamins (Vitamin C and some zinc, they do help). Drink lots and lots of fluids. My mother always use to encourage drinking what she called 'clear fluids' when ill, which usually consisted of things like water (the usual), Sprite/7-Up, and Gatorade. Food wise, stick with soups for a bit, like chicken noodle (more fluids, again). If your throat is sore, by all means, do take some pain medication for it, or otherwise it'll make it hard to get anything down. Tea with some honey in it, also good for sore throats.