I've had constant back ache and keep getting period like cramps, I've been loosing my mucus plug for the past week or so and my lady parts are so painful when I stand up or walk, my belly feels very heavy when I stand up it hurts! I've had diarreah now it's gone back to normal! Felt very sick also I don't know if I'm engaged or not as haven't been checked, is this a sign of labour?