HUGE BUG: Pre stuck on headphone mode! help

Question

I was listening to music on my Pre and had my earplugs plugged then I got call so I unplugged them and now I can only make calls using the speaker mode or a bluetooth headset and the internal speaker doesn't work anymore. During a call if I look at the icons at the bottom of the dial pad screen, the bottom left icon to switch to speaker mode is now a headphone icon and if i press it, it goes to speaker mode. I CAN'T switch back to normal mode. I've restarted my phone several times, tried everything I could , it's been 2 days and still cannot make a normal call!
Please help, and no I don't want to reformat my phone  
Post relates to: Pre p100eww (Sprint)
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Answer 1

Maybe the lubricant works and maybe just plugging and unplugging a few times works. Sprint was aware of the problem but had no solution so processed a replacement phone for me. I solved the problem and cancelled the replacement.
Problem: Phone stuck in "headset plugged in" mode (can't hear anything on phone calls)
Cause: Unplugging headphone while playing music
Solution: Run Audio tests as follows
Select Device Info | Preferences | Tests | Interactive Tests... | Audio.
Select these tests: Phone, Headset jack, Headset microphone.
Start | Continue
On the Phone test, press Play, answer No, even though you hear the sound
Same on the Record part of this test, Record something, Play it back and answer No, even though you can hear yourself.
On the Headset Jack test, plug in a headset, click No Response
On the Headset Microphone test, click Yes
I'm guessing the calling VoiceMail with a headset plugged in, muting it, then unplugging the headset solution would work to reset it too, but this one worked for me.