i had what my midwives called "prodromo" labor and an irritable uterus... sounds a lot like what you're going through.
i just did my best to deal with the contx during the day, and some nights i would drink a glass of wine, or take some skullcap/valerian root tincture to slow things down enough to sleep.
please have faith that your baby is doing some very important last minute development right now... that hurrying things might actually cause your baby to have breathing problems.
but yes, it's maddening. i think it's nature's way of telling you to clear your plate, settle down and get ready for the serious business of birthing.
warm water, a gentle massage, quiet time with your dp... try to enjoy these things as much as you can before the baby arrives!