Husband and I had unprotected sex 4 days ago. My period was supposed to start today but it didn’t. My periods are always early or start exactly on time. They are NEVER late. I took some tests that both came back negative but I still can’t seem to shake the feeling that I’m pregnant. Wouldn’t it be unlikely to already have a missed period if we had unprotected sex only 4 days ago? Shouldn’t this period still come as usual? The wait is killing me.