Thanks for using the forum. I am happy to address your questions, and my answer will be based on the information you provided here. Please make sure you recognize that this forum is for educational purposes only, and it does not substitute for a formal office visit with your doctor.
Without the ability to examine you and obtain a history, I can not tell you what the exact cause of your symptoms is. However I will try to provide you with some useful information.
In some patients with seizures, the MRI can be entirely normal. This occurs in patients with a disorder called idiopathic generalized epilepsy. The MRI ideally should contain specific sequences that examine specific areas of the brains such as the temporal lobes closely, and should also be done with IV contrast called gadolinium (a dye). It is unusual that you have weakness on one side of your body with a normal MRI (assuming the MRI was of good quality); sometimes disorders in the spinal cord can lead to a gait disorder and weakness, so if that is suspected based on specific physical examination findings, imaging of the spine may be indicated (though spine disorders would NOT be an explanation for seizures). Finally, there are a few disorders of the central nervous system that can lead to weakness and seizures with normal MRI, such as certain genetic, metabolic, or mitochondrial disorders, and other peripheral nervous system disorders (such as neuropathy) that would not explain the seizures but would rather potentially explain weakness or walking difficulties. peripheral nervous system disorders such as neuropathy (a disorder of the nerves in the arms and legs) are suspected based on specific physical examination findings and history, and if suspected, can be tested for by a study called EMG/NCS. Again, peripheral nervous system disorders would not explain seizures.
EEG in between convulsions can also be entirely normal; sometimes, several EEGs are needed prior to any abnormalities being detected. A lack of response to seizure medications (meaning continued seizures while on medications such as the ones you are on) could indicate that the doses are not enough (which can often be assessed by checking blood levels of these medications), that the epilepsy is intractable (meaning difficult to control with medications; sometimes more than 2 medications are required to control seizures, and unfortunately in some patients despite multiple medications, seizures continue to occur), and another third possibility is that the seizures are not epileptic.
In some patients, seizures are not epileptic, but rather are due to stress. In order to confirm that the seizures are epileptic, an EEG would need to be done during an actual attack. Meaning that if an EEG is done during an attack (such as the convulsion you describe above) and the EEG shows the seizure in the brain waves, then the seizure can be confirmed. In other people, convulsions occur but these are due to stress and not true seizures coming from epileptic activity in the brain, in which case the EEG will not show epileptic activity during the convulsion. In such cases, the convulsion is not epileptic, and would not respond to seizure medications, but rather to medications that would help treat stress, depression, or anxiety, and psychological therapy. Sometimes, prolonged EEG monitoring in an epilepsy monitoring unit is required to capture a seizure while the person is hooked up to EEG.
If you have not been evaluated by an epilepsy specialist (a neurologist specialized in seizures) this would be of benefit to you.
Thank you for this opportunity to answer your questions, I hope you find the information I have provided useful, good luck.
Thank you. I will talk to my Neurologist about these things. I have not to my knowledge even had a Contrast MRI. And only one eeg. Thank you for your efforts and i thank you for the advice.