S.F.
I got one when I was about 20 weeks pregnant and I didnt get out of bed in time to stretch it out or to place my foot flat on the floor and I was in serious pain for about 2-3 days after. It sucked but it did eventually get better. I got maybe 1 or 2 more while I was pregnant but I havent had one since but the other times I felt it coming on I shot out of bed like a rocket and the pain went away almost immediately
Good Luck