I'm 27, married and been ttc. My af has been bang on time for the last 6 months since I had my marina coil removed. Last month (dec 2010) we ttc right around my fertile time, but I had my af and thought nothing of it. After my af we didn't ttc at all that month, I'm now 4 days late this month but bfn on two hpt. Feeling very confused and wondered if anyone else has had similar problem? I don't have any real preg symptoms or af symptoms. Please help xx jos xx