So it turns out that we have no phone service.
I'd been a little surprised over the last week or so that there were never messages on the answering machine, because we usually get calls from telemarketers and stuff, but I didn't really think anything of it. Then today the person from Genetic Counseling called my work phone because she couldn't get through to our home phone. To callers, the phone seemed to ring once and then click a few times and hang up.
At that time, I was able to call the phone company on our phone. They're sending someone out on Friday - they could have sent someone tomorrow, but we won't be home most of the day. They told me that if it turned out to be our fault somehow, we would be charged $75-$100, and tried to offer us some insurance that costs $7/month. We refused the insurance, of course, because we don't think that this is our problem, and why would we pay an extra $7/month for something that we almost certainly don't need.
Later on, a technician called and said that our line seemed fine. He reiterated the fact that if the problem is our fault, we'll pay $75-$100. Whatever. When we got home, the phone didn't work at all. Kinda makes you wonder if the technician screwed up the line even more than it was already messed up, doesn't it?
Anyways, I see the Genetic Counselor on February 5 . Apparently there are a couple of refinements to the tests that I'd had done before, so we're going to go ahead and do the more refined tests. Chances are that they still won't show anything, but I think it's worth it to do the tests.