Good night girls. I just ran into something. Yesterday evening at work…

Good night girls. I just ran into something. Yesterday evening at work, after a minute of anger with a colleague, I felt strange "movements" just below my belly button and it popped right out, like a bump you can feel with your hand. It smoothed out in about five seconds. So there's this question that has arisen. Is the uterus tense up? Can't be that the baby is so strong to move at such an early stage...