Missed period

Hi everyone. I've been taking ovulation a tests and got a smiley face on the 5th just gone. We've been very busy prior, and especially on the day I was ovulating. I should have had my period on the 6th though as I did the month before but nothing. No spotting etc could I be pregnant?? It's only the first week but today I've been  sleeping a lot and eating. I've got ovary pain/cramps but still no signs of coming on...is it too soon?