Deja vu and weird feelings

For the past few years, I would get these déjà vu like feelings, and it would feel like arise in my stomach and a familiar scene playing out. It would only last a few seconds, and once it was gone, I could barely remember what it was that I thought of. It’s not necessarily a bad feeling. It’s actually kind of cool. Recently, they started to happen more frequently. A couple of the times it did seem like I had a metallic taste in my mouth, and it usually happens around my hormonal cycle. The past couple of days I’ve had a few, and I just feel really down and out. My doctor gave me Topamax to try and I’m gonna start it tonight. I just wondered if anybody else had any similar stories and what has worked for them.