Am I being paranoid or is this concerning?

The tribble stayed up late last night for new years and has been very tired today, she’s eating, pooping, drinking, her tummy feels fine, but she’s just kind of drowsy/ not interested in anything and keeps doing this thing with her head. She’s not doing it all the time, but I’m super paranoid so does this look like she’s just really sleepy and falling asleep standing? Or could it be something else that I need to get her checked out for. I looked in her ears with a flashlight and everything looks good there, is there anything else I should be on the lookout for that would indicate one way or the other? Something feels “off” but I can’t tell if she’s just tired and I’m bothering her or if it’s something more 😭