I’m now 34 days late my boyfriend and I have been having unprotected sex I took a pregnancy test (4 of them) all came back negative I’ve been having cramps here and there but eventually go away and I also have lower back pain I feel a bit nauseous only certain days I did go to the doctors for a blood test but didn’t get my results she just sent me to the gynecologist. Has this ever happened to anyone? What could it be? Help?