yeah, sounds like you have a short somewhere causing a pull on the battery.
Have you done any work on the car recently? Other than an oil change. If so, go back trace everything that was done. If you didn't do the work, let us know what was done and we might be able to give you some places to look.
First of all though, I would get the battery out of the car and get it on a charger. If you don't have one, take it back to where ever you bought it and they should be able to charge it back up. Now, with a nice fresh charge in that battery, stick a meter on the battery and check the amps. Leave the meter connected and start pulling fuses, one by one. Pull a fuse, step out and look at the meter. Did the reading change? If so, you look at the items and assocated wiring that are located in that circuit.
That should help you narrow down what's going on here.
