Hi, my period is late by 6 days. It hasn't been late since I had my son and it has always come between the 20-22 of the month and leaving between the 23-25 of the month like clock work. I have had sex right before my last period on dec 19 and then I got my cycle on the 22, it was rather light and I didn't get bad cramps the day before like usual. I didn't think anything of it because it at least showed up. Now I've been waiting for my period for 6 days and nothing yet. No spotting no cramping no headaches. I have taken a home test and both were negative. I haven't changed my diet drastically and I haven't been stressed out at all. I also have not started any new medication or vitamins. It's been 5 years since my period has been this late or irregular, what could this mean besides pregnancy? Could it be pregnancy?