Can someone relate ? Is this normal?

Last night after I came home from work, I did my usual thing . Shower and go to bed. In the middle of the night I started to get a really dull pain in the middle of my abdomen.  A few minutes later the pain turned into a really sharp pain. It was severe enough to make me get up and vomit. My stomach soon after started getting hard and the sharp pain traveled towards my lower abdomen. It persisted for about an hour. There was no unusual vaginal discharge or fluids, no blood ... Nothing just pain. After trying to soothe the pain by walking , stretching and a light back rub the pain finally subsided. I've felt baby move but I'm still very uneasy about this whole situation. I never went through anything like this with my first so this caught me by surprise . Has anyone one been through something similar ? If so what was it?