Seagate 1.5TB dropped from office table... TWICE.

Upon connecting my harddrive to my laptop and just getting up from under the table, a person walked by and knocked it down causing the 2.0 USB cable to pop out of my laptop. After a few minutes of apologies, I connected everything back and everything seemed fine. Less than 5 minutes later, I get up for a cup of coffee and when I come back, the hardrive is on the floor once again. This time, the case is cracked open and I can see the internal parts of the harddrive. The USB plug is bent on the harddrive side, and once again, the USB plug was unplugged on the laptop's side. I tried plugging it in, but this time my laptop was taking unsually long to read the Seagate's folders. Once it loaded the BackUp folder, nothing was inside. I tried to close the window and re-opening it, but to my surprise, My Computer didnt even pick up the Seagate Harddrive. So then I tried unplugging the power cord, waited 5 minutes, and plugged it back in. Now it powers up and makes a whirlling noise then shuts down. Does not do anything at all. Help me please gurus. :'( The information on that hard drive is very very important.