What in your house can cause seizures? Me & my dog both have seizures!

Ok, here's a good one... I have had epilepsey for 5 years.  It started when I was 23 years old shortly after I moved in with a man who is now my husband, we still live in the same house.  Top neurologists and neuroseurgons have never found a cause for it, no head trauma, no excessive illness, no tumor; but my seizures do always originate from the same place in my LTL.  I'm just one of those "don't know why it started" people.  And I have had EVERY test in the book, gone to one of the top epilepsy centers, and even tried to have a LTL resection, but couldn't complete it because the focus of my seizures is too imbedded into my language center. 

Anyway, I just watched my 4 year old beagle (dog) Roxy have a seizure, it was like she was really confused then started shaking and stiffened up.  It looked like a complex partial then generalized into a grand mal.  It was terrifying, now I know how my husband and other loved ones feel when they see me have one.  My husband has seen her have a couple and I have seen her have a smaller one before.  We didn't think too much of it because the vet said that dogs, especially smaller ones can occasionally have seizures for no reason.  But now I'm thinking is this house trying to kill us???  Yes, I know it sounds crazy! I was just wondering is there any signifigant common thing in a house such as mold that can cause seizures & epilepsy and how do you test for it?  Any input would be great, thanks!