14 weeks and occasional brown spotting

I need Help ladies...I been having this light brown sometime dirty pink/brown spotting for a couples of weeks now since week 11 and 2 ultrasound and they don’t seen anything abnormal, but I continuing having this on and off spotting, doesn’t last the whole day, like every 2 days , not enough for panties liner, no cramping, only when I pee and wipe and not always. Called the doctor she doesn’t seem concerned and just telling me to rest. Any advice from anyone of you ?