signs of early labor!?!! help!

Hi guys so, TMI, I lost my mucus plug two days ago. Today I've had some pretty uncomfortable allover stomach cramps, severe pelvic pressure, hurts to walk and move at all, have been pooping all evening, have a headache and am getting nervous. The entire pregnancy baby has been on my left side, always pushing her butt out and has been head down since around 31 weeks. She is now, still head down but, butt on the right side and is kicking and flailing like crazy!!!!! I've had several people say they can't believe how low she has gotten in just a few days. My stomach is rock solid really poking out! Still in a lot of pelvic pain but the cramps have chilled out since I took a bath. Help? Any idea when you guys think she will come? Does this sound like early labor!?