19 weeks tomorrow and still not feeling anything..

I'll be 19 weeks tomorrow and I've still not felt any movement from little one. I've tried everything (drink cold water, lay down, sucking belly in, sticking belly out) I'm so scared it's because somethings wrong. I've lost 3 babies in the past (all in first trimester) and I don't know how to relax myself. The last time we had any reassurance that baby was ok was at 15 weeks when we had our last ultrasound. We go in next week for our anatomy scan. Any tips on how to stay calm until then?