Or possible knocked the Floppy drive inside?.
Go in Device manager, Remove/delete the Floppy Drive then restart Win XX this will/should reload the driver.
Does the Floppy Drive light stay green all the time ?.
If it carries on playing a wobbler, I would replace your drive if all above fails.
Posible that you may have crushed or damaged all your floppies ?, are they in fair condition and fairly new ?.