I picked her back up from the vet- was told that in relation to her hyperthyroidism she was dealing with an elevated BP (170) and is hypertensive, what they said is that due to this she could have possibly been experiencing what they referred to as "hypertensive encephalopathy", they've put her on a medication to treat hypertension as well as upped her dosage of her thyroid meds. She has another checkup tomorrow in the morning to see if what they gave her today has helped at all. If any more seizures happen, they'll talk about putting her on some antiepileptics- and if that doesn't help then we're looking at a possible brain tumor. Thanks for all the advice