For the last week I've been feeling nauseous and threw up once and experiencing hot flashes. I also got my period so I was wondering if I could be pregnant or what is wrong? I took two home pregnancy tests and they both came up negative.

You could be pregnant, you could have the flu.

Is your period late? If so, how late?

No its not late it is a bit lighter then usual though. And as far as the flu I feel fine other wise

Unfortunately you are playing the waiting game. Wait to see what happens next month with your period. If it's missing, take a HPT. Make sure to use first morning urine to get the most accurate results. Until then, treat yourself as though you are pregnant. Take a prenatal vitamin (you can get them at any pharmacy), eat healthy, avoid tobacco and alcohol and get plenty of rest.