Is how I'm feeling a sign of pregnancy?

I have not been on birth control for two months. My last period was sept 30-October 5th. My bf and I have had intercouse several times the week before I was fertile, several times during my ovulation time, and a few times this weekend. My next period technically shouldn't start until the end of the month.. But all of a sudden I am tired all the time, I feel like I am constantly hungry (like I can't get full), I have indigestion, and some occasional cramping. I have felt this way since the middle of last week and something just feels different.. I can't explain it. Has anyone else ever felt like this and ended up pregnant? I want to take a test but I am holding out for another week or so because I feel it's still to early. I am also peeing all the time!!