I screwed up with a plug in and can't undo it!

Hi all. I made a critical error while experimenting with a plug-in and I can’t seem to reverse it. I’m building a website for a musical artist and had it all working perfectly. I created both an audio player (using Flash Mp3 Player) and a youtube video player (using Place Youtube Video) that were operating in homepage widgets. I needed an audio player to play in an interior page as well so I was experimenting with some other plug in’s. I was using the SSG WordPress Google Audio Player plug in and there was a “Auto embed” box that was checked. It has completely overridden both the Flash Mp3 and the Youtube player now. They are just empty spaces on my homepage. I’ve tried everything to reverse this. I’ve deactivated AND deleted the Google player plug in. I deleted the Flash Mp3 Player and reinstalled it, etc. Nothing is working. Somehow a piece of code must have been written into the CSS that is still there even though the plugin is gone. I have little knowledge of code and have no idea how to resolve this. Any suggestions are greatly appreciated!