This is my 2nd pregnancy but I was induced with my first. Since this morning, I have had top of belly tightening/contractions, upper back pain, lost some mucus, constipation that turned into diarrhea, groin pain & some contractions that are irregular. For the past hour, hour & a half, every time I stand up & walk I have severe tightening all throughout my belly as well as feeling immense pressure on the top of my belly pushing downward. Should I be concerned? Call my doc? What do you think this is?