Getting New Kinds of Pains?

I'm getting these dull pains on the sides of my abdomen. They're not really cramps, just quick little pains that go by pretty fast. What could these be? I'm 15 weeks 2 days pregnant, so i don't know if it's the baby "kicking" but i think it might be some kind of movement... anyone else feel this during pregnancy? Answers will be much appreciated.
some are kind of towards the bottom of my rib cage, and some are towards the top of my pelvic bone

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Tagged as: abdomen, baby kicking, cramps, pelvic bone, rib cage