For the past three days I've been feeling little muscle spasm type feelings in my uterus. Like light…

For the past three days I've been feeling little muscle spasm type feelings in my uterus. Like light little tickly thuds! Usually at night about 3am when I'm relaxing. If I was doing something besides just sitting watching tv I probably wouldn't have noticed it. But I looked it up and found out you can start feeling baby around 13 weeks. I can't believe this!! The first time it happened I just brushed it off like it was a muscle spasm but it's not always multiple twitches. But the next night it happened it was just one little thud. And then it happened twice today. This is so exciting!!!