What Are The Chances Of Pregnancy While On Hormonal Injections?

Hi, may I answer your health queries right now ? Please type your query here...everytime i get my period by 28th day.this month i took a hormonal injection from doctor to get pregnant.today is my 32th day but i didnt get my cycle and today i had home pregnancy test, thats report is negetive.is stil i hav chance that i m pregnant?what i should do?