If your youngest tests positive, absolutely have your other kids tested. There are many adults on here that didn't get diagnosed until their 20s or 30s. This can be either because doctors just missed it for 20 years (though I don't know how), and the person always had respiratory problems.... or because they just appeared that healthy. Either way, people are diagnosed way into adulthood all the time. So even if the other kids seem healthy, chances are high enough that they might have it, so it's worth getting tested.
Another piece of advice. Have ANY AND ALL children tested at a CF accredited center. You can find one here:
<a target=new class=ftalternatingbarlinklarge href="http://www.cff.org/chapters_and_care_centers/
">http://www.cff.org/chapters_and_care_centers/
</a>
The reason I say this is INCREDIBLY IMPORTANT is because although many regular doctors can be very smart, CF isn't widespread enough for the average doc to know much about it. Often non-CF centers administer the test wrong, read the results wrong, or both. So it's imperative that you find a CF center for this testing. Besides, if your child has CF, the best place for them to go is a CF center, because they're prepared to tackle all aspects from all angles, and with the best knowledge, meds, and treatments. So check out that link. <img src="i/expressions/face-icon-small-smile.gif" border="0">
As for being scared, no one will blame you. But CF's getting easier to manage all the time. The average, according to the CFF 2004 patient registry has jumped from 32 to 35. That doesn't hold for the entire gamut of patients (for instance, those of us my age or older generally don't fair as well, simply because by the time the newer meds come out, we already have too much lung deterioration to be helped a whole lot - it's a lot easier to prevent than it is to go back and repair damage already done), but it holds very true for the younger children, as they are *generally* still in pretty good shape.
Let me just leave you with this one last piece of info. When I was born (1984), my parents were told it was unlikely I'd live past age 18. Here I am now, at 21, with about 70% lung function. And the average is now 35. So the average for your children would be 35 now... and by the time he hits 35, it may very well be 40s or 50s or higher. So don't completely lose it. Read around the boards, a lot of us have a lot of bad stuff to say about our lives (who doesn't?), but we also generally have a lot of good to say. <img src="i/expressions/face-icon-small-happy.gif" border="0">