Ok well if its not a spider wobble or poisoning, which I'm 100% sure it's not (because where are these symptoms during the day or when I'm holding her?), then I don't know what it is. She may just be a weird snake. I'm not going to worry any further about it until (IF) she starts showing worse or more frequent symptoms. Aside from this neck thing at night, she behaves like a normal ball python. So I'm going to treat her as such. I have an exotics vet very near me so if she does get worse, I'll take her straight in. For now, I'm going to leave her be and treat her normally. thanks again to everyone for their input and guidance!