^^
ok so, according to you there is no spinning.
Now its clear that some parts have moved inside your DVD Drive.
What I am expalining below is not for newbies (please consider doing it if you are confident enough)
Step 1 : Open the DVD Drive cover.
Step 2 : Clean the lens with a cotton cloth (with some camera lens cleaner).
Step 3 : Move the lens manually back and forth with your hands.
Step 4 : Look for loose connections, screws etc and tighten it. (don't put your force on it)
Step 5 : Replace the TRAY and Cover it back.
Step 6 : Install it on your computer and see if things go RIGHT!
If the above procedure doesnot help take risk in doing the following :
You Tube Video