I am 17 weeks pregnant and I had pain in my pelvic it has happen two times since I turned 17 weeks. It will start and slightly go away with feet up?

Pregnancy. At seventeen weeks of pregnancy, the fetus is strong enough to cause a cramp in the uterus with movement of the legs or arms. If this continues over the next few days, go to your obstetric provider for an ultrasound. This is probably normal, but for peace of mind, you should be examined.