I felt mine at 18 weeks like that. To me if felt like a fish flopping/swimming around. Now at 24 weeks I get some hard kicks. They get stronger everyday! It's so exciting to actually realize it's the baby and not something else. :)
That's about when I felt mine... I think I was 17 or 18 weeks.. Honestly to me they felt like fart bubbles in my tummy.. Sounds gross but 100% accurate for my case.
@reaganmommy2015, I thought I was feeling a little flutter, but I wasn't completely sure so I laid my hand across it and felt a jab from the inside which felt like it could be a kick. I've actually been feeling it for a few days but didn't think it could be the baby until I felt it again today. I'm so anxious for it to be baby, I'm convinced it couldn't be.