diabetic ?neuro manifest ?

has anyone heard of a diabetic having confusion (not seizures -all eeg normal -also has been to epilepsy monitor unit nothing) but all symptoms are seizure like ,pt feels like her eyes are rocking back and forth ,she gets a feeling in her stomach like she is going over a roller coaster ,numbness on rt side of her face ,tingling ,confusion ,not able to talk sometimes ,has lost consciousness during at least one of these episodes ,tired afterwards sleeps ,her physician thinks its related to her diabetes somehow ,blood sugars are always 100-160 during an episode ,v/s are always ok ,she is on metformin but wasnt when first episodes started ? so dont think that would be it ? any ideas ???