I have weird random pressure sensations over my whole body.?

It's almost thought provoked, as in a moment of anxiety puts a pressure sensation almost like a falling heaviness over my whole body pushing inwards for a second. It's kind of confusing, but I think it's been happening for a long time because when it happens I feel like It has a memory behind it and it initially started when I was young. But I have no idea when or why.. It happens randomly and I'm just curious if anyone has ever heard of anything like this? Probably not lmao..