My dog is acting really odd?

I recently came back from a holiday, and returned to my dog acting really strange. She is a 7 year old lhasa apso and lives with 2 adults 2 children and another dog, a German Shepherd. She stayed with a family friend for one week, and a relative for a second week. During the second week she started being sick. We are now home and she is running about following people about, lying in the shower, running under desks and jumping on beanbags and circling about 20 times before running away... she is not staying still. does anybody recognize this behaviour?