Is this switching

I knew I said I was going to take a break but I'm dying to know. This may be a stupid question but probably most of my questions are anyway. Is it a switch if your facial expressions change but nothing else happens and you are still aware. Sometimes when a child voice pops in my head my facial expressions change. Like my mouth seems to open wider, there may be nodding. I may lower my brows if they are angry or confused. When there is arguing inside I may even point. I don't do this around people so it makes me confused about what is going on and if it's alters. I know this a hidden disorder but it makes me feel like if I can control it is something else. But I can't really control it. Like I don't say ok I'm going to start arguing with myself, or point, etc. Occasionally I have actually noticed myself doing something kind of weird like shaking my head no when voices start. Then I kind of catch myself and am like okay my dad probably saw that. Or the people at the group home but it's rare. The few times someone has spoken aloud has been in private. So I mean why is that I have that control but don't because I don't think these things anyway much less say hey only speak when alone.