It is interesting that you ask this now, because I am a recovering bpd and had an episode last weekend. During this one, I can't recall hardly anything, as if it were one long day (it lasted for four)only slight bits and pieces.
I did some online study today and found that one of the sx's is amnesia. Mine is associated with ptsd from childhood and broadened to bpd. So I am now working on determining whether this amnesia they speak of is considered post trauma, or during episodes.
To answer your question from my personal experience, yes, I don't remember anything
said tome for 4 days, my husband is helping me recall the events and conversations. I also had several outbursts and broke objects that I don't remember.
this is exactly why I isolate myself. (one of a few)