Confused

My period is a week late, so I tested and it was negative. I've not been stressed or sick here lately. I had sex every day, sometimes twice a day, while I was fertile. I have all kinds of pregnancy symptoms && I've had a child before, so I know what to look for. I'm nauseated and throwing up water/stomach acid, I'm peeing constantly, I'm not wanting to eat and when I do eat it's things I don't normally like. I'm moody which is really weird for me. And I feel pregnant. But the test was negative... Advice please?