well, i phoned the OB like a good mommy yesterday. they made me come in to check if the contractions were having any effect; i.e., dilation. since i was due for an ultrasound next week, they did the ultrasound anyway.
baby is healthy, the placenta is no longer blocking the cervix (no more placenta previa, no more pelvic rest, woohoo!), and the cervix is closed.
ambien will help me not to have those contractions, relieve my stress, and help me sleep. so this is our plan. i'm going to take it easier, breathe more, not try so hard to do all need to (though my "best" was failing miserably at that), and take a little pill before bed to help me calm down.