18 weeks - waiting for baby to move!

I'm just about 18 weeks , and I know it's normal- but I haven't felt definitive baby movement yet and I'm just nervous. I get some wierd pains and strains but nothing I describe as as "flutters or bubbles" etc. I think I'm just worried because I've had so little dr appts/ scans... I have 2 weeks to wait to see the baby, last time was at our 10 week scan - 2 months ago! Since then have heard heartbeat at one appt... I know all is probably normal , I just wish I had a sign the little one is in there!  I just wanted to know I'm not the only one out there....