I have unprotected sex with my boyfriend all the time and we have never had any incidents but this month we had sex quite often and specially on the day of my ovulation which freaks me out. About a week ago I had 3 straight days feeling nauseous but I would never throw up, I burp the feeling of nausea out of my system instead, which I thought was great because I hate throwing up. Now my period was due the 22nd of this month and I had no signs, normally, well most of the time my breast start to feel sore a week before but in this case that didn't happen, I started feeling sore breast on the 20th. I also had some sharp cramps in the morning of the 22nd and I thought it had fanally arrived but it didn't, and the cramps stopped. Today is the 23rd and yes I know is only one day late but I'm so used to having my period on time that it freaks me out when is not, the question is could I be pregnant? Or I'm I just overreacting?