Am I pregnant

So last month my period was very irregular, it started about two days late and when it finally got there it lasted only two days. I made a doctors appointment and she gave me a urine pregnancy test and it was negative. About five days later I started my period but again it was irregular and now a week later I'm throwing up everything I eat and sleeping more than usual. I've taken about 5 hpt and they all said negative but I know my body. What should I do?