Why won't my iMac camera work on Omegle?

A few weeks ago I started using Facetime on my iPad. Ever since I did that the camera on my iMac won't work on websites like Omegle. I turned off Facetime on my iPad and the camera worked again on my iMac. Once I turned it back on (and tried turning it off again) my camera on my iMac just will not work. I've installed the latest flash player all the latest updates but nothing seems to work. I'm able to use my camera in photobooth. When I open up Omegle I don't get the pop up window to ask me to allow and when I try to turn the camera on by hovering over where my picture would be, it doesn't allow me to. When I click the red button, nothing happens. I have pretty much zero programs installed on my iMac to begin with and I just have no idea what's causing the problem. I thought it had something to do with Facetime but maybe that was just a conicidence. Does anyone have any suggestions? I'm starting to get really frustrated.