18 DPO, AF 4 days late. 2 negatives

So, my period was supposed to come Friday (it’s now Wednesday evening). We were intimate the day before ovulation so I assumed I’m pregnant but I’ve taken a dye test (Saturday) and clear blue digital on Monday. Both negative. I don’t have my usual period symptoms, the past two weeks been stuggling with severe constipation and nausea diarrhea. Last night, I drank a wine cooler and threw up before evening finishing half. My breasts aren’t hurting bad but they are too uncomfortable to wear a bra. And I’ve had an abnormal taste for chicken, any and every chicken! Is there a chance I’m pregnant although both tests are negative? Has anyone ever experienced false negatives in their early pregnancies?