i used to get these all the time when i was young, ive had once since being pregnant, the doctor told me when i was young it was a lack of magnesium/salt in my diet, he told me to go and get magnesium phosporate (spelling?) tablets.. im not sure if u can take them when youre pregnant so if you decide to take them maybe talk to your doctor??

i got them from standing for a long time.. the pain lasts about a day for me, depending on how bad the cramp was.. i usually dream that its happening then wake up swearing lol.. i stretch as soon as it happens..