I had crazy heartburn for a couple of nights, felt hungry far more often than I usual did and my trips to the bathroom increased tenfold! All very surprising to me since I recieved my BFP the day I was due. I didn't even really think it would turn positive. I was a bit of a POAS addict. I did have a suspicion though, as OH and I DTD for about a week straight when I knew I had O'd. I was just so used to disappointment when by the book, it seemed impossible for me, not to be!