Uh... confused lol..

So I don't have an appt until Friday with my obgyn but she told me if it gets worse I should go to the ER but I don't think it's that serious.. I've been spotting brown for 4 days now and I'm 5 dpo.. its enough to need a panty liner.. I know you can.have it after AF and ovulation spotting but I don't think this is either of those.. any ideas ladies? were TTC #1 for 8 months now