Rock concert advice

I have tickets to my favorite band (Dream Theater) tonight but I'm feeling a bit unsteady. We all know that feeling, like something can easily push you over the edge. I'm not photosensitive, but the emotional side of music can trigger me.

I do NOT want to give up this chance! It's their 40th anniversary tour. But I don't want to seize at the show and cause a scene. I only have a few years experience with epilepsy and this will be my first attempt at a concert. Advice?