someone please help!

i don't know what happened to my little chin. i came home yesterday and my mum said that while i was out, the door banged and my girl jumped and ran straight for her hiding house. that was at 4pm and she stayed there till 10+pm when i returned. it's normally not that unusual for her to hide there in the evening since unlike most chins, she rests at night and plays in the day, especially the morning. however, this morning, she wasn't standing at the door waiting for her daily playtime. i had to carry her out. now that she's in my room, she's hiding in the corners instead of hopping gaily around. she accepts pellets when i feed them to her, but she's really jumpy. i don't know what to do. should i leave her alone for a while? i'm so so worried.

please be okay, little one.