Question

So I’m 16 w 4D

And Every so often I get a short small cramp, pain ,ache

I don’t even know what to consider it. It don’t last long it’s like quick but I feel it mostly when I’m sitting down.

Does anyone know what this is ?

I’m a first time mom so I don’t know what the baby would even feel like Moving would this be it ?

Any advice is appreciated thank you