I wouldn't lay down if there bad something can be wrong try urgent care they may be quicker here once your 12 weeks you can go to L&D see if you can go there it's different everywhere
if the cramps aren't really bad I recommend laying down in a comfortable position and trying to rest and if they persist call your Dr tomorrow and see what they say. but follow your gut, if they're really bad, or you have a strong feeling about it, go to the emergency room and get checked out to be on the safe side.
my Dr told me to drink water..