Dell Inspiron 6400 Keyboard key came off

Question

I was typing normally and while i was typing i think my nail got between the space between the letters e and d and when i lifted my finger while typing, the key 'e' came off abit (not completely came off) so now its diagonal. It still works though but im not sure if my keyboard keys are the type that can just be pulled off... Im really upset and i dont know what to do.. do i need to get it professionally fixed or can i fix this myself? HELP!!! :'( I need this laptop for my uni work and im having trouble typing now since i feel like my finger is going to get in the even larger gap and flip the whole key off. My laptop is a dell inspiron 6400... Its only 4 months old i cant believe i wrecked it...Please help me asap I WILL REALLY APPRECIATE IT