Hello I Have A Few Concern. I Have Had Episodes

Hello I have a few concern. I have had episodes where my body would go into a seizure type mode. this been happening for over 5 years off and on. I was told it was anxiety and panic attacks. well after a few years of no attacks I got one. this was different my left side went numb it stayed that way for 4 days. then on the forth day my left side gave out completely I couldn't move it was numb heavy feeling and I couldn't speak. I went to ER they couldn't find anything wrong I had have few more test and nothing. and my body still feels numb and sometimes it doesn't respond it hurts and tingles most of the time