Help! Head shaking

[Meghanlovesanimals]

https://photos.app.goo.gl/H5quKepCX3VzrEeu7
Is she in heat? My other one is doing it as well.

 

[SQ]

Some rats show signs of being in heat, others don't
If her ear are vibrating, if she freezes arches her back and vibrates when you pet her lower back, then she is in heat