There is a disease that strikes pugs, usually between the ages of 2 and 3, called Pug Dog Encephalitis, or PDE. Very little is known about this disease other than the dog having seizures is the primary symptom. It is an inflammation of the brain.
If you Google "Pug Dog Encephalitis" you will find many, many links to read that will provide you with not only a lot of information, but will give you a lot of good information to present to your veterinarian so the two of you can work on this together.
Of course, there is always the chance that the seizures could be coming from another source, but the first thing I thought of was PDE when you mentioned a 2 year old pug having seizures.
Please keep us posted and let us know what your vet says, and how your dog is doing.
Ghilly
You mention Xrays...but has she had a brain scan? If this were something like epilepsy, I am not sure things like this would show up on either Xrays or bloodwork.?