So I went to my 20 week ultrasound 

I went pee before the ultrasound like I always do cause I always have to pee when I get there; then I went for the ultrasound and the baby wasn't moving much. Everything looked great, like they usually check, they checked the four chambers of the heart, the Kidneys, the Brain, everything they usually check. The baby wouldn't stretch his legs out and wouldn't flip (he looked like he was getting ready to flip) or stuck in this position because my amniotic fluid was low they said. I feel like such a bad mom. I feel terrible. They said they're almost sure everything is fine because everything inside him is working perfectly. Has anybody else had this problem before? In drinking plenty of water and in 6 days they told me to come back.