My last period was December 7-12 and I am usually pretty normal and go in 30-32 day cycles. We had sex around December 21st. I am a few days late right now. I have a horrible lower back ache (worse than normal), bloating, tender boobs, slight headaches, frequent peeing, and am tired. This has been happening for a few days. I usually get some of these symptoms pre period but not as significant. No signs of period today either. Do you think there is a good change I am pregnant or should I wait yet?