Do parts take over for other parts?

I am very new to this. I’ve been working with my therapist on parts work and visualization. I found my first part today when trying to figure out a certain trigger.

I let myself be triggered with my counselor and saw the part that stopped it. He’s an orange blob just as confused as I am. The more I asked, the bigger he got. I felt like I was having to yell at him to listen. He told me he doesn’t want me to be distressed and when I told him I’m always distressed, he got really small and started crying. It felt like he was new here and trying to overcorrect. Like the part that was SUPPOSED to help gave up and got fired. And brought this guy in who is overactive.

I felt bad for my anger in the moment. But I think I am trying to give him some sympathy if he really is the new guy who walked in on my life being up in flames in 2019.

I asked him what he needed from me, and he said “certainty that it won’t happen again.” I don’t know exactly what “it” is, there’s many things. And I also said I can’t offer certainty of anything. I have moderate to severe OCD and in ERP currently as well. Certainty is what drives my anxiety.

Not sure who he is or what will happen but i do feel hope for the first time in a long time.