For the past couple of days I've had sharp stabbing like pains down below and having a lot of belly ache and runs. I've had a lot of acid reflux and it's been feeling like I've needed a poo a lot, when I go to the toilet nothin happens and it feels like I'm constipated and having a lot of pressure in my bum too. I've been feeling drained a lot and tired, one minute I'm tired, next I'm full off energy. Does this sound like the start to labour?