I came of the injection ahout 3 months now my bf discharged in me but i took a morning after pill, whst are my chances of getting pregnant?

Little chance: A morning-after pill taken the day after sex is very effective in preventing pregnancy. It is about 95% effective, which translates to: if 100 women take the pill the day after sex, about 5 women get pregnant, and 95 will not get pregnant from that sex. The morning-after pill works less well on days 3, 4, or 5 after sex. If no regular period comes in a month, one can do a urine pregnancy test.