stress trigger?

up until today my cramps havent been nearly as bad or as frequent as they were over the weekend. but today when i went back to work and then tonight when i was at the hospital visiting my friend they came back. thankfully, not as many or as intense as before, but enough so that i knew what was going on. the only think i can think that was different from earlier in the week was how i felt at both places-tense and stressed. so can stress, positive and negative, be a trigger for these cramps? something to keep an eye on, thats for sure!