I had sex and the condom broke i took the morning after pill the day it happened a week later i am having some pains and brown/white discharge does this mean i'm pregnant ?

No way to know yet: The morning after pill commonly causes irregular bleeding. You will need to take a pregnancy test 2-3 weeks after the event happened to see if you are pregnant or not.

No: It is not uncommon to have some withdrawal bleed after taking the morning after pill. Scant bleeding would cause that brownish discharge. If you miss your scheduled period, take a urine pregnancy test.