Difference between contractions and painful baby movements....?

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My mid wife told me my stomach tightening is most likely contractions, but sometimes I wonder if its just the baby moving or balling up in a certain spot. 

I did, however, have pretty watery pink discharge earlier.  Regardless, how do I distinguish between each thing... such as movements vs. minor contractions, discharge vs. leaking fluid little by little?  It seems like every time something happens it could be either A or B. How to tell?

Im 34 weeks and baby feels very low.. hes been moving so close it feels like hes right there lol and my bladder feels like its flipping. Hard to explain