Im 29 and have been ttc for 2yrs with baby #3. Since I had my DD the only thing that has changed is my job. I am a swimming teacher so spend approx 12-15hours a week in the swimming pool. It is a warm pool at 32•c and it's a chlorine pool. Could this be the reason that I don't get my BFP? My cycles are regular and I O almost like clock work. I have recently gone back to my GP and have been referred to a fertility clinic.