I have an ultrasound on Thursday at 15 weeks; we heard the babies heart beat at 11 weeks. I have been sick/nauseous, but I still have the fear of having a missed miscarriage. I haven't really felt any movement and I keep seeing so many women saying they are feeling flutters for second time moms. Should I feel confident that my baby is fine considering I'm still really sick and my belly is getting a bit bigger?