just a thought it could be side effects from the shot, i had a coil in for a year and when it was removed i started trying for a baby right away, i thought i was pregnant that first month but it turned out to be side effects from the coil being removed that was giving me the same symptoms as pregnancy, i even had the brownish bleeding you have described.
if your period is late and you have had negative hpt's then i'd say you probably aren't pregnant.
hi
are you trying to conceive?