Hi Holly,
Sorry to hear about the problem with your camera. I shoot almost exclusively in PMode do I wouldn't consider it a problem, however the real issue is that you should definitely be able to switch mode.
I would try resetting the camera by taking the batteries out of the camera for at least a half hour. Change the batteries while the camera is being reset.
Insert the fully charged batteries and see if your camera now works. Hopefully it will. If so, all the settings will revert to the factory default, so you'll have to go back in and change to any preferred settings.
If resetting the camera doesn't work, call Olympus tech support for a professional assessment of the problem. You gotta get photos of that new neice or nephew!!
