S.R.
C. - I have read some good advice below and also some really stupid questions. When you say that you are freaked out because you didn't expect to learn that you need the procedure, obviously you aren't just electing to do this for fun. I would expect a bit more sensitivity from some of the moms that have responded. For me, the decision to have an amnio was excrutiating. After an abnormal ultrasound, followed up by a level 2 ultrasound performed by an absolute jerk of a doctor that was supposed to be a guru on ultrasounds, I was told that at age 28, I was at very high risk for Down's Syndrome. I was really against the idea of having an amnio because I was determined to keep my baby no matter what problem she might have. Ultimately, after crying for days and days and worrying and being completely convinced that my child would had Down's Synrdome, I decided that if that was the case, fine, but if not, I wanted to relax and enjoy my pregnancy, not just for me, but for the sake of my baby. Luckily, everything turned out fine. The procedure itself was creepy, but not really all that painful. The worst part was having to have a full bladder for SO long.
Best of luck to you - I have known SO many moms who have been told that something might be wrong and in the end had healthy babies.