How can I tell if I am having night seizures?

How can I tell if I am having night(sleep) seizures? I have had epilepsy since i was a child, and am being switched from Dilantin to KeppraXR, aside the terrible headache i wake up with every day.. I also seem to have woke up a few times very sore.. like i'd ran a marathon in my sleep.. and so tired..  couple weeks ago I awoke and as I was waking I realized my left hand was rigid and boy was it sore, took a bit to open it.. then last week I awoke, and my thigh muscles felt like someone had beaten them, they were sore like I'd climbed 50 flights of stairs.. My husband sleeps very deeply, although he has seen me clenching my jaw in my sleep..

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if you feel these symptoms after waking up its very possible that you've been having night seizures.  Try asking your doctor for a sleep scan, this will more definatly pick up anything.  also you may want to think about anything that you do before you go to bed that may trigger it? i understand that epilepsy can be triggered by all sorts of things, not always conscious, so don't worry if you can't find anything, its just an idea if you want to give the doctor and more possible answers.  also about the Keppra, it can be very good for some and very bad for others, so just make sure that if you feel worse you must get in touch with your doctor.  i really hope you find out, hope i've helped.