Went to the doctor Monday! 2cm and 50% effaced. Have lost mucus plug. Woke up throughout the night with sharp pains but nothing consistent. All day have been cramping sometimes worse then others. I've been counting belly tightening and it's about 7-10 times an hour. OB says to wait until there 5-7min apart but it's hard to really tell because everything hurts and is crampy. Anyone experienced this before and it be early labor?