I keep having deja vu experiences, and it's been going on for quite a while now. I have a conversation and then moments later I feel certain I've said those exact same things before, but I don't remember when and it seems unlikely that I actually have. It's not a huge problem but it's weird. Anyone know of meds or psychiatric symptoms that could cause recurrent deja vu? Could it be related to ECT messing with my memory?

Edit: Even as I'm posting this I feel certain that I've posted the exact same thing before.