OK people, i think this is it!
I've been having a show since 7.30am which has not stopped at all. I've had a period-type ache all day in my tummy with slight back ache. At about 6.30pm i crashed out on the sofa and then decided to take myself up to bed for a bit coz i was soooo tired. Now i'm having mild contractions, but i've not been timing them so i'm not sure how far apart they are yet. Will get the contraction timer on the go i think!
I'll keep you posted!