Well, I got her to eat last night. I was going to wait til Monday (feeding time for my BP) but saw her little head peeking from the sand, and I know that can mean they're ready for prey ambush. So I thawed my last pinkie, and offered it. She got scared and pulled her head under sand so I laid it down near where she was. When I came back later she was pacing the glass, so I scooped her up and put her down with her head touching the pinkie, then left.
Came back a half hour later and the pinkie was gone, and she was cruising around with a pinkie sized lump in her belly! She saw me come close and flinched away and lightning-slithered into her hidey log, which she's never done (she's so slow and chill) and I haven't seen her since. So, I'm assuming that she maybe was just hungry, despite tefusing my first two attempts at feeding. :)
I will update again if she resumes the behavior. As of now I'm just happy she finally ate something. I know they have a reputation for being able to go a long time without but she's so little I was getting a little worried!