For all my pregnancies it was always nausea, always knew it would show a bfp on a hpt with nausea. But this pregnancy I didn't notice any symptoms (didnt have nausea straight away) but it was ds2 who acted strangely. He would have to lift my top up and put his head on my tummy and just kept repeating this over the next day. Dh and I then knew, took a test and two dark lines appeared.