My period was due on the 13th of October which would make me over a week late and I am usually like clock work. My husband and I weren't trying to get pregnant, but weren't preventing it either because we both are aware the "pull out" is very risky and we use no other form of protection. My boobs are tender and nipples seem to be somewhat darker, but I'm wondering if that is just in my head. Also my cervix is high, soft, and seems to be closed but i know that's not a guaranteed way to tell either. I have taken 4 hpt's (2 clearblue & 2 first response) and all say negative though :? I'm not stressed about being pregnant so i don't think that's a factor but is it possible to be pregnant even though the tests say no? How common are false negatives after you are already late--and four of them at that. I'm in really good shape otherwise so i have absolutely no idea what is going on here...any help would be greatly appreciated.