Welcome to HCM.
You are carrying 9 wks pregnancy and present with light bleeding,brown discharge,abdominal pain
for 1 wk following sexual intercourse.
It is may be due to early abortion bleeding or implantation
bleeding or Threatened Abortion
So better to do a USG for FPP for viability of fetus before going to medical abortion
if you think so.
If it is threatened abortion,then medical treatment and bed rest may improve your pregnancy status.
But if there is no sign of fetus viability,then medical abortion is indicated and can be done with Mifepristone or Misoprostol
tab. If complete abortion does not occur with medicine,then surgical intrvention (D & E) is needed.
So consult with your doctor about your choices.
Be well and tc.