Please respond! Late period. Pregnant?

I was supposed to start my period January first but it hasn't come yet. I had sex at the same time I was firtile. My periods aren't ever late. I've been more emotional the last week than I normally am. I've been hungry the past week and I have been soooo tired! My boobs aren't aching and they normally swell when I'm about to start my period but they haven't changed. I've been thirsty and peeing a lot. I can't seem to get enough water in me to quench my thirst. I have a headache that won't go away. I feel uncomfortable inside but I'm not bloated or cramping but I have noticed a pain on the edge of my hip. And my teeth have bled the last two times I brushed. Does this sound like I'm pregnant or that I'm just late on my period? Please respond!