Negative test but feel pregnant!

Hey guys, about 4 weeks ago me and my husband had an accident he usually pulls out, but didn't this time. I was due for my period 3 days after it happened and I got my period. After my period was over I started feeling nauseated and my smell seemed to have gotten really sensitive. My boobs are sore, swollen, and visible dark blue veins. I have extremely bad nightmares every night and get up to pee more than usual. I am extremely hungry and tired 24/7. Bottom line I feel pregnant. I have taken 4 tests all negative. My period is due next Monday so am I testing too early or am I just going nuts lol.