'Hi! My Friend Suggested Me To Take Norifam, Since She

'Hi! My friend suggested me to take norifam, since she is taking that injectable norifam every month for almost a year, so i take her suggestion. But the thing is i injected it without my period.

I used pills in febuary 12 and have a contact on febuary 15 and injected Norifam on March 2.. In the month of febuary i haven't got my period. My question is could i be pregnant? But i used pregnancy test this day March 10 and it says negative.