Baby Bump?

Possible baby bump?
I took a test today and showed up with negative. 
But IV always been on the very very thin side. With a flat stomach. 
Could this be a good indication even though my test came back negative. 
Still have not missed my period. But my mother said she was the same way. Her body reacted like crazy to all the hormones and couldn't hide her pregancy at all.  

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