Unless she were on insulin for diabetes, it is unlikely to be low blood sugar. A pancreatic tumor (most common cause for hypoglycemia or low blood sugar in an adult dog outside of an insulin drug overdose) would cause seizures and collapse usually. The disorientation(confusion) could be a number of things from a mold toxicity from digging something up(usually along with muscle tremors), middle ear infection and something toxic like kidney or liver failure etc. The fact that she is eating is good and there may be no immediate danger. You are looking at her and must decide if she is depressed or getting worse. If so, go to your nearest emergency veterinarian tonight for an exam and complete workup. If she is ok then go to your regular veterinarian tomorrow for and exam and basic profile(urinalysis, radiographs and blood profile.) Hope this helps a little.
Dr. Jay Mawhinney
Great! It sounds like you can wait until morning. Do have a good workup if possible. Things like this can be based in the heart and lungs, middle ear, or abdominal organs.