I wouldn't be surprised if she broke some teeth like you said with how long she held onto the tongs... I know she did bite her tongue, but I'm hoping she didn't bite it hard enough to bleed since the tongs were in there most of the time keeping her from clamping down completely on it.
lol yeah, I have to chop nightcrawlers really small to convince my turtle to eat her vegetables. They always bleed all over the place when I do that. Unfortunately, I'm pretty sure it wasn't the worm's blood, since I broke it off as soon as I realized there was a problem and only saw the blood after I finally got the tongs out.

Gonna feed her again tonight and try and get a good look at her tongue then. She's probably glad I got a pro-feeding reply on here. Thanks for the suggestions, I kind of freaked out when that happened last night.