Ever since I got on the pill, I've had a brownish discharge

Depends on what pill, but most of them it is normal.  I was on a 4 period a year pill and that is what had happened.  Went my OB doctor and he told me it was normal and not to worry about it.  Well, I switched pills and the same thing happened.  However this time, I was on one that I had a period every month.  I would have brown discharge INSTEAD of my period and he told me that it is because my uterus was changing and the lining of my uterus was "being cleaned" so I couldn't get pregnant.  I've been off the pill for almost 2 months (with no period) and have had NO discharge whatsoever.  I'm not pregnant, but I don't have the discharge either.  When you have a period, there are small 'bubbles' that go through your ovaries and that can sometimes cause ovarian cysts (which b/c is used to correct) and if there are any that have fluid instead of blood from your uterus then that can also be a cause.  I became friends with WebMD after about 4 months of discharge even when my doctor said it was normal.  Honestly, unless it just gets too annoying, I wouldn't worry about it.  If you don't like it, then just go to the health department, your ob doctor, or your pcp and ask them about it.  Best of luck