Thanks for your query.
As you have already been for your follow up visit, you should be assured that the abortion
A little bit of cramping and brownish discharge might persist for upto 4 weeks, and yes, it is normal.
do not worry as long as the check up was fine.
It would be fine within 2 - 3 weeks, and once you resume your normal menstrual cycles.
Sexual activity is allowed within 4 - 6 weeks of an abortion, however make sure you stay protected so that you do not conceive again so soon after a procedure.