was 2 weeks late now i have a light period

i had my period on feburary 2nd, & it was bad. I never really miss a period unless im pregnant so im really worried that i might be pregnant again!! my period was suppose to be on march 1st but it never came. i was having nausea & i was very emotional. So now it is today & i finally got my period & i was over joyed, until i noticed that it was very light & im not having severe cramps. im just hoping someone could help me or give me some advice. by the way i took a pregnancy test last week it was negative & i also have had blood test done. thankss:)