laptop wont play or recognise DVD's anymore?

i wanted to watch a DVD i haven't watched that is in a box set i got as a present i went to insert it in my laptop but nothing happened it made all the right noises to start with then it was making a different noise (don't know how to describe it) and a couple of times for a split second the CD icon appeared next to the mouse pointer then the disc stopped making any noise i tried the DVD several times the same thing kept happening so i tried a DVD i knew that worked same thing happened i did experience this a couple of times about a week ago but the two DVD's from the box set i watched on different days did play

i've hardly used the DVD drive though i don't always remember to remove discs after use so shut down/start up my laptop with a disc in until i remember to remove it could the drive have become broken or are my DVD's faulty