Pregnancy question

Molly
Hi everyone!! I've got a question...I'm pregnant with our 2nd child. I'm currently 17 weeks and 4 days. I've experienced some random bleeding/spotting since the first trimester. Everything is ok! I did the same with my first. However, I've only gained 2 pounds since my first OB appt and I'm hardly showing. You wouldn't even know I was pregnant! Is this normal? Should I be concerned?? Is this the same with anyone else?