Stress can definitely bring them on... I've been getting them for a while too, it's gotten so that I can't do much anymore. I'm due in 4 weeks. They come and go all day long and in the evening sometimes they just stick around and there doesn't seem to be a break.
My midwife said to try to count and see if it's more than 5 an hour, she would consider that pre-term labor. But mine tend not to follow a pattern, or even let up for that matter, and at my last appointment she said the baby hadn't dropped yet so I was ok.
Take a bath, drink more water, remember to breathe! And call your HCP if you're concerned. Sorry, I know how uncomfortable they can get when they plague you like that. Try to keep in mind it's a positive thing... the stronger your uterus (cuz this is your uterus practicing for labor) the more efficiently it will work to push baby out! Hang in there sistah... I feel your pain!