I Had A Grand Mal Seizure In March (we Do

I had a grand mal seizure in March (we do not know why other than possibly b/c I discontinued my propranolol for 3 days for a test). A month after, I either developed Diplopia or noticed that I had it because it began affecting my balance. I would have frequent falls while running. My neuro ophthalogist (sp?) has me doing weekly occupational therapy. My neurologist has no clue what is causing my Diplopia. My MRI is fine, he just ordered a test to check for MG, and I have an EEG with MG next week. A LP may be necessary. Whether the information provided above is relevant or helpful, I am wondering what may cause Diplopia? I have horrific headaches. I also have a slight intentional tremor and severe leg cramping if that matters. Is Diplopia usually benign?