Am I pregnant

I had a MC last year May 2014 and av been taking some multivitamin but my last period was January 2015 I didn't see my period for feb and I did a pregnancy test it was negative and am throwing up nd my tummy is getting bigger nd my lower back hurts but on March 5 I saw a little blood in my pant and yestaday its stop but today it's coming out again wit a little tissue. Wat suld I do