I NEED ALL THE HELP I CAN GET

I have been very sexually active with my boyfriend. Never used condoms. Never used birth control. I have been experiencing for the past two weeks the normal pregnancy symptoms. No throwing up, but smells make me nausea.. smells I'm normally okay with, plenty of backache, sore breasts, high emotions, I've had creamy discharge, I've lost apetite for certain things I love but also gained it as far as my eating pattern goes. Lastly. My need to pee has been at an all time high. I took a pregnancy test that came back positive (2pm) Following that I took two more that came back not positive ( night time). I took all those tests last week. Now that this week has come, I am three days late and I feel cramps in my lower stomach as if my period may come but I'm never really late? Am I pregnant?  PLEASE HELP.