Weight??

Shannon • Mother of 7 wonderful children and baby #8 is due July 2017!
I'm almost 15 weeks pregnant and I have only gained 1 pound so far!! I swear with my last pregnancy that I had already started gaining weight by this point! I am definitely showing my belly is a lot bigger but I'm not sure what's going on with the scale! As anybody else been experiencing this? So far my doctor doesn't seem to have any concerns about it but it's bothering me!