Am I pregnant or what is this?

So I just finished my period and it was about 6/7 days. Kinda light to regular amount of bleeding, But yesterday and this morning I've been dizzy, exhausted, and I threw up first thing when I got up this morning and I felt like it would happen again until about 1pm when the nausea/ and some dizziness subsided but everything else is the same.

I took a pregnancy test (which is a little out dated) and it said negative.

Update: I have been seriously emotional ever sense my period ended a few days ago, and I keep getting mad at my SO lol. And I'm craving foods I never eat like burgers and Mexican. And sweet food like chocolate/sugary stuff I don't eat often.

What is it? Am I pregnant? It still says no in the test but I just feel REALLY weird!

Help LOL!