Hi Synnove,

The visual sensation you mentioned sounds like a aura (simple partial) sz, but I have never had one last 30 min. they usually last only a few seconds. When I have a sz. it usually happens anytime between 6 am and 3 pm very seldom do I have sz. in the evening. I've gotten so used to them they don't bother me anymore and since I had the surgery I don't get tired nor do I get a headache after the surgery.
I have been told that a migraine is a chemical sz. but I've never been told it was an aura to a migraine. Keep track on how the weather is because often a low pressure in the weather will give some people migraine headaches. I often get headaches right before it's going to rain or snow do to the heaviness in the air which in turn affects a persons hormones and can trigger sz. for some people.
If you can see an Epileptologist they will be able to help you the most. Also if you haven't notice I sent you a message check the top of the right screen where it says private message and click that. I also think you should get a lot more rest this can trigger sz. like crazy for me. Here's wishing you well and May God Bless You!

Sue