Baby switching sides

Morgane
Hi everyone! 
So for the past two weeks I've been able to see the lump that is my baby when he/she sits on one side of my stomach. However the past couple days, my baby is CONSTANTLY switching sides. Left, right, left, right. I've read that a lot of babies tend to stick to one side and I was wondering if anyone else had a super crazy baby like me?! I'm 18 weeks today. Thanks! :-)