Is this dissociation?

When I get overwhelmed in social situations, especially when I feel like I need to "perform" in a certain way, I disconnect. The way I experience this is a feeling of living in my head. My thoughts take over and I become very unaware of my surroundings. Sometimes I start focusing too much on things like swallowing and start compulsively swallowing air which can lead to painful bloating. My movements become mechanical and my face feels numb. I usually don't speak at all or very little. I also feel inhibited and find it hard to engage with the people around me even if I'd desperately like to. It's like I feel trapped. I become overly self aware and feel disconnected from my physical body. This sometimes makes me unwillingly do inappropriate things. Like laughing out loud when there's nothing to laugh about. Although I think from the outside I mostly just appear very apathetic.
People who suffer from dissociation/depersonalisation have described things such as feeling like certain body parts do not belong to you. I have definitely never experienced something that extreme. So I've wondered if what I experience are just symptoms of anxiety. Can anyone relate?

To me that sounds like you are becoming ungrounded. I find I feel caught in my head when that happens. have you tried meditating?

my psychologist says dissociation is more when you become completely disconnected. it has only happened a few times in therapy, but I completely zone out. after she managed to get me back I had no idea how much time had passed, had dilated pupils, and told her I had just went to a quiet place.

Whatever this is, I'm exactly the same as you OP.

I feel like my right eye is popping out of my head.

I feel like I can't use it, or I've lost some sight. But it's working fine I just get consumed with those sensations.