18 weeks today, and not sure if the baby is moving?

Lizzy • I'm a first time mom to my handsome little boy who was born 8.26.17💙 he makes me incredibly happy. follow our journey and I'll follow yours!😘🙂
I'll post a baby bump later 😋 but I've been laying here on my back and I think I can feel the baby kick, it feels like muscle twitches kinda it's like my lower belly also and it happens like 1 minute after another. But now I don't feel it because I got up and was moving around. I know when I usually feel the baby, it'll feel like little taps and or butterflies but I'm not sure if this is the baby too 🤔