One thing you might ask for, if you've got access to it, is a fetal fibronectin test. It involves taking a swab of your cervix, and I think 48 hours or so have to pass since your cervix was examined (so the test results won't get confused), but it can really be reassuring if you're dealing with this sort of thing now. As I understand it, if you test negative, there's a really good chance (like 98% or something) that you WON'T go into true labor for at least two weeks. Apparently it tests for a protein that's only released at the very beginning of pregnancy and when delivery is coming soon (I wish I could explain it more fully; I recall it being a fascinating protein).
With my first pregnancy in 2000, this test was just starting to be used, so although I always tested negative with it, they kept me on bedrest, mag sulfate, etc. when the B/H were starting to have heavy episodes and I was starting to efface at 28 weeks. But I ended up going totally full term, not going into true labor until my due date!
I'm now 23 weeks pregnant with my second, and the B/H are starting here and there, pretty strong already! I'm determined to be calmer about it this time around (and I'm lucky that we have my past history to give us more info than you've got), but my midwife had the great suggestion to start using the fetal fibronectin test when I hit the 26-week mark or so (assuming the B/H start getting heavier and more frequent, as they seem on a path to do). If it's negative, I'll be able to relax, knowing I very likely am "safe" for at least two weeks from that point on. And then we'll just do them as needed.
I know all that stuff about wanting to minimize bothering the cervix, etc., but this is really just a little swab and I figure they'd be down there checking my cervix all the time anyway once the B/H started in earnest again.
Anyway, perhaps worth looking into!
P.S. I also found two things helpful in calming my B/H the first time around (had just as good if not better luck with these remedies than any of the chemicals offered at the hospital, in fact!): warm baths with essential oil of chamomile and lavendar, and taking homeopathic magnesia phosphorica. The gentlebirth.org archives have more natural remedy suggestions, too; I may try some of these later.