Hiccups?!

Ka

So I am 16.5 weeks and I was just sitting at my desk at work and all the sudden I started feeling a rhythmic pulse or twitch in my stomach. It lasted for about 30 seconds. I think maybe it was hiccups? But the weird thing it was up by my ribs and theres no way the baby is up that high yet. Although I am sitting kind of slouched over. So weird! It definitely felt like nothing I've felt before and now I can feel him rolling around in there.