Peculiar feeling with switching. Warning this may trigger.

I've felt peculiar all day. I don't wanna be too specific because I don't wanna cause any distress to anyone.

I have a client who brings out my little one. She really likes him and he spoils her a lot. She tells him absolutely everything to the point where (me) the host is almost gone and she tells him about a lot of abuse from her life. I can barely remember much of it afterwards but for the rest of the day I feel kind of weird. Not sad or distressed or traumatised but kind of like I don't know who I am. I don't know how loud I'm talking and I don't recognise my own voice and my thoughts and opinions feel really separate as if they're just floating around in the air and after some sessions I can feel like I've got a migraine but not today.

I'll be OK tomorrow but I'm just trying to make sense of this. I don't know hink it's like an in between state.

Any insight?