Hi
It was very brief but it sounds most likely that this was some type of minor seizure. Typical seizures are major or 'grand mal' events when dogs lay unconscious and go into violent spasms, but minor seizures can vary in symptoms quite a lot so there is no typical pattern with what happens. There may just be a brief period of odd behaviour. At least she had some blood work recently so that was useful in helping rule out an underlying medical problem.
As brief as this event was and bearing in mind your circumstances it is not unreasonable to just monitor what happens next. If more seizures happen, longer or more frequently that changes the picture and she really should then see a vet.
Cathy Wickenden BVet Med MRCVS
Barton Lodge Veterinary Centre
1 Midland Road, Hemel Hempstead, Hertfordshire, HP2 5BH
Tel: 01442 216048 24 hours
[
www.bartonlodgevets.co.uk]