Late and feeling SICK

4 days late and this morning I woke up with a sore throat, coughing up mucus and my whole body is just so sore! Terrible headache, back pain, I'm so hungry I feel like i'm going to vomit but no food sounds good. I feel so sick, and like I've been hit by a bus (literally). I had mild cramping on the left side the past 2 days but none today. I plan on taking a test tonight if I don't start to bleed but I've had the same symptoms like my period is going to start, it just never came. I think I may be coming down with the flu, but I've also heard that is a sign of early pregnancy. Has this happened to any of you ladies?? Help!!