Hi girls! I will obviously call my doctor tomorrow to check with her but I'm hoping some of you have experienced this and can explain what it might be. This morning what I'm assuming is my uterus got very hard and tight. There was no pain, and when I put my hand their it softened up after about 2 minutes. About 20 minutes later it did it again and this time I had what felt like menstrual cramps (not very painful, just a dull ache). Again they both went away and it hasn't happened again.