Bleeding 17 days after sex

I am a 17 year old female.  I had sex for the first time and it hurt but there was no bleeding.  The second time it still hurt but after i started to bleed.  I know that is is normal but i have been bleeding since then.  It also hurt to pee after but that went away.  I called my gyno and she brushed it off as spotting due to my second month of a new birth control.  I have a feeling it is not due to the fact it started right after sex.  It was not rough or hard or anything like that.  My gyno asked me to take a preg. test so i did and it was negative.  I am concerned and confused.  Please help me.

Thank you

[sandy828]

it sounds just normal.
was the sex protected? if not u might have an sti
or a urine infection.
when is/was your period due? take another test then to be sure
if your not happy persist your gyno or go to a different doctor

[ncgirl1234]

it was protected and my period is due this week

[Kim1989]

protected as in condoms or protected as in bc (you mention you were on bc)