Normal, what's normal?...

Well, I need to do a little venting, maybe a little feeling sorry for myself, and who knows what else today.  As you all know we are having a second little one, currently 15 weeks along.  We decided to do the alpha-fetaprotein test at the doctor on Tuesday.  I expected to have similar numbers to when we had the test with Jack last year, unfortunately, there seemed to be something different in mind.  The test screens for spina bifida, down's syndrome, and trisomy 18,  we had a very low rish for spina fibida and trisomy 18 but the risk for down's syndrome came back at 1 in 50.  I can look at that 2 ways, one is that it seems rather high (especially since with Jack it was 1 in 330) or the other way is that there is a 98% chance that everything will be perfectly fine.  Also, another thing is that there is a high rate of false positives with this test.  Even knowing those things, it still worries me.  It just doesn't make much sense as to why I can't seem to have a "typical, normal" pregnancy.  I seem to have to end up with something strange that goes on.  It is so discouraging and worrisome.  The ultrasound we are having in less than 2 weeks will tell us if there are any other abnormalities with the baby - like size of arms, calcification on the heart, and other markers which note an increased risk of Down's syndrome and if those come back abnormal then likely we will elect to have an amniocentesis to perform further testing.  We are hoping everything measures out to be normal and this is just one of those false positives. 
Other information going on, I am going to be having some further blood testing done to check for any blood clotting disorders to rule out that being an issue regarding my pre-ecclampsia.  I go in Tuesday to get the blood drawn and hopefully it will help provide some answers which can help me have a long, healthy pregnancy this time.  Seems like alot going on and I'm hoping for some positive answers.  I ran into one of the high-risk doctors who followed my case while I was in the hospital last year and he suggested to my OB for me to have this testing completed.  I'm also hoping I will be followed by them to help prevent problems this time around!

Sorry to be such a downer, but I'm hoping that by getting all this off my chest it will help with my worrying, but as you all know, I worry, LOTS, so likely I'll continue to worry until Dec. 28 and at that time all will be normal!