Braxton-Hicks Contractions --- Question regarding this

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Okay, so for the last week I have been trying to have a garage/yard sale... this means I am doing everything by myself (pulling the tables out, moving all the boxes into the yard and organizing the clothes and accessories) since my husband is at work. Well I also had to make signs and put them on the road so people would notice I was having a sale (which meant dragging my sons stroller around on grass - which the wheels like to turn whenever they want lol) and I seem to feel overwhelmed by the time I am done with all of this. Last night, I ended up going into the hospital thinking I was having 4-minute apart contractions (I am 29 weeks along) and when we got their they said that my cervix was closed and that the monitor showed no signs of contractions - which in turn meant braxton-hicks.... my question to you all is, could all this work I am doing turn into true contractions or will it be braxton-hicks until she is ready to come herself? Am I overworking my body to make these contractions come on or does this have nothing to do with why I am having these contractions? Is there a way of stopping the pain when it arises or do i have to sit through the pain?