my CD player isn't working either, and it tells me there's a CD in it?

My problem started out as my music would cut in and out if I went over bumps and was listening to my phone with an AUX chord. Now my car wont play any music other than the radio. The AUX port on my car for some reason doesn't register I have anything plugged in, so I can never listen to music on my phone. Now my CD player isn't working either, and it tells me there's a CD in it, when there isn't, and won't accept a CD. Is there anything that I can do? Or do I need to take it to my dealership?