Hello I'm Emily, I am 15 years old and have been sexually active for about year. I am with my boyfriend who I have been with for 6 months we are sexually active and recently we have been doing the pull out method its been about 2 weeks since we last did it that way and now I am getting brown discharge but its very light not enough to use a pad. But my period isn't due for another 3 days, but I useually get pains in my tummy about a week before I have my period but I haven't had it yet :/ does this mean I'm pregnant?

Pull out is not a real method people who use that are normally called parents soon. There are lots of sperm in the early fluids, pulling out only reduces the chance, but still plenty of chance.

You will have to wait till past time for period and if it does not come do a pregnancy test.