When I went in a couple weeks ago for my ultrasound at 19 weeks, the ultrasound tech told me he couldn't see the baby's kidneys or spine... He told me not to worry because it was just a weird position that my baby was in and that it happens quite often. But I am going back in for another ultrasound so he can find them on the 25th of this month. The wait is killing me. I can't help but worry. Should I be worried??