Pregnant and due :) xxx?

Hi im not sure if im 37weeks(2july) or 39weeks(due 18june) My lmp date would leave me dus 2july but my 3d dates leave me due on 18june.. My gp told me last week my baby is fully engaged and she does not think i will make it too 2july she said too go by 18june. 2weeks ago i got braxton hicks but have none since!! I get like pains in the middle of my tummy like tightening pains but am not sure if the babys body is turning or there contractions? anybody no? I also get really bad pressure pains were i feel like im going too wee myself and have too run too the bathroom before i wee myself. Iv also got pressure pain between legs when i move a certain way?? Anybody know if these are signs of labour? xxx