I'm 14w2d, and besides gas and constipation my cramps are gone. Does this mean my uterus isn't growing? Besides constipation and heartburn my symptoms have vanished. I have no bump, nothing. At 8+3 ultrasound had a BPM of 183. At 12+6 it dropped to 164. Everything is growing right, but I'm a FTM and can't stop worrying!!! I'm 18, so what are my odds of losing the baby?