From my own perspective, what you have described sounds like the way I experience my dissociation (depersonalization and derealization). Certainly your traumatic weekend, and even being so profoundly depressed and suicidal could have triggered it. Whether or not you would have actually gone through with it, your mind may have sensed that your life was in danger, which is a common cause of dissociation, even in people without a dissociative disorder. At this point, it's probably too soon to even speculate that you may have a dissociative disorder - only your pdoc/T can diagnose that anyway - but you need to have the dissociative symptoms in the absence of any mood disturbances, which clearly it sounds like you haven't.

I have both bipolar and a dissociative disorder (Depersonalization/derealization disorder) and do have the dissociation even when my bipolar is stable. But sometimes they play together - I tend to dissociate between episodes, particularly when I'm cycling and switching between the two poles. It's like my brain needs to put itself into neutral - even for just a few hours - before engaging in the other gear, so to speak. Just something interesting I've observed.

The meds could be a factor, but you said you were feeling this way before the meds. That's a tough one to tease apart and will just take some time.

You've been through a lot recently. Give yourself some time to regroup and get your feet back on the ground. Try not to think about it too much, have plenty of protein (it's been known to help) and take it easy for a few days. It will likely go away.