I've had the worst heartburn for the past week or so and my boobs have been somewhat sore for the same amount of time..but it all pretty much started only 4 DPO. I never really noticed EWCM though. It was wet but didnt stretch like EWCM should. So i dont know if I'm checking wrong or if I just never got it. Now I'm just waiting, seeing if I get my BFP.