By "hit a wall" I just mean you're talking, and then can't anymore, the whole train gets derailed.

Quick background: Diagnosed mid-90s during a psychotic manic episode. I was \~30. Spent the prior decade in a constant hypomanic state, with intermittent depressions. Started on valproic acid, currently on lamotrigine 400 mgs and clonazepam 2 mgs, plus an AIDS drug cocktail, hypertension med and a statin as well. My doctors consult regularly to go over potential interactions and the speech thing doesn't fit the side effect profile of this constellation of drugs. MRI shows no damage.

Anyway examples are: you're talking to someone, responding to whatever they said, and halfway through your response you just totally lose the ability to continue and complete your thought. I mean, as if you hadn't been speaking at all. Or you "word search." Or another example is someone's telling you stuff, and you have a question, but the question goes back three levels and you have to say, no, what you said before that, and then again, and finally have a Eureka! moment. Part of it might be age, but it's a little extreme. Anyone go through this too?