I am so glad I am not alone. I have read through this whole thread and see that no one has any answers after all these years.
I have 4 kiddos, with the last one being a emergency c section, just a little over 2 years ago, then an immediate tubal done. Originally, I thought maybe my body wasn't adjusting to the clamps and such that were put onto my tubes during the tubal or that the doctor didn't put my insides back in correctly. I've told that to both my doctor and husband, and they look at me like I've got 10 heads lol.
One of the first episodes I remember happening, I was sitting in the tub, and was leaning over shaving my legs and it felt like when a baby has ran out of room in your belly, and is moving around trying to get comfortable, if you have been pregnant you know the feeling I am taking about. It's painful and takes your breath away. I had to adjust my weight in the tub to make it stop. Then I watched as something moved from the right side of my abdomen back over to the left side and it was over, but a few minutes later it happened again.
I've had many episodes of this happening, some more painful than others, but the thing that stays constant is the fact I can see whatever it is moving, it's not just a feeling that something has moved out of place, you can see it.
I had another episode with it just a couple weeks ago. I had had pneumonia (non covid pneumonia) the week before, then all of a sudden I started having a lot of brain fog issues. I was leaned over in my kitchen with just my head on the counter and it happened. Something moved on my left side in the area under my ribs but above my pelvis area.( side stomach area) It took my breath and I stood up. I pulled my shirt up, seen that my abdomen was kind of sunken in on my left side, and a small bulge on my right side (like when a baby moves to one side of your belly trying to stretch out) then I watched as whatever it was, moved back into place. It happened again, while my 12 year old daughter was standing there, and she asked if I was pregnant, because it looked like a baby moving. She laid her hands on my stomach and felt it move back into place. She swore up and down that it felt just like it did when I was pregnant with her littlest brother.
I ended up at the ER a couple days later because of the brain fog issue, and it happened while I was there, laying propped up on the hospital bed. The nurse seen it, asked if I was pregnant. I told her no, and that I had had a tubal 2 years ago. I told her that this had been happening off and on since I had my last baby. She told me it was probably gas 😖 I told her that must be a massive amount of gas to move my organs to the point you can see it pushing my stomach out and seeing whatever it was move back into place. She shrugged it off and went about her other rounds.
No one seems to know what causes this, but I am glad to know that I am not crazy and others experience this as well.