I take Lamotal and toptiamate and yes I have side effects of the latter
Can't sleep headaches nausea etc gound it a terrible drug saw neurologist coming off slowly.

Severe headache and nausea

100% yes.
I become very hyper, very often. I have bouts of extreme and prolonged laughter, uncontrollable and every time I think it's over, a feeling comes in my stomach and diaphragm that forces more laughter to come out. I've never been able to control it and very often it reduces me to tears because 1) it eventually hurts, a lot. 2) I feel extremely embarrassed when it happens when I'm around people who don't know me and 3) the biggest reason, is that I feel utterly helpless and a slave to it.
Not a very cheerful response so I apologise for that.

I do not but would be nice to laugh more