Convulsions/seizures related to anxiety?

Hi, have history of massive panic attacks and minor anxiety attacks. Dealt with both over the years with exercise and no stupid prescribed drugs. I am now an expert on stopping these attacks, until recently. Last two times I was very worried about something I ended up in convulsions.. (first time uncontrollable stomach seizures that controlled my body and uncontrollable tearing in my eyes for 4-6 hours.)... Last night, I was worried about something and I had the exact same thing happen but my son kept telling me to concentrate on breathing... It went away after 4-5 minutes and the second ." I one only lasted a few seconds. As my adult as son explains it "You are convulsating!" (I told him to stop calling 911). Shorty after he told me that, I began to feel the horrible feelings of BOTH panic and anxiety attack together at once (there is a huge difference). I guess my question is can anxiety really cause seizures/convulsions? After these attacks, I was so exhausted. I felt like someone put a needle in me and took out everything I had....Any suggestions appreciated (except going on some stupid pills)? PS Each time before a convulsion, I am either laying down or sleeping. Each time my dog is in front of my face breathing my breath ( I've had her 11 years now, she has never done this until these episodes happen).