Muscle spasms?!?!

I'm 9 weeks preggo with my second child and I have been having "muscles spasms" in my lower pelvic region where I know baby is.. I guess it feels like baby kicks its crazy and I know baby is super small to be able to feel him or her but still it surprises me when it happens. I know the baby is super active I've gotten to see jelly bean on ultrasound just kicking away and punching...anyone else have this? I know I might sound crazy lol