Brown discharge and Frequent Peeing

I (23F) have been experiencing a pregnancy scare this past few days because i've had unprotected sex 7 days ago (even though it was just the tip inserted and no ejaculation) and i know there is still a risk since it was days after my period. My problem started after I had a random brownish discharge 5 days after the intercourse with mild cramps and frequently went to pee. Other than that, no other is different in my body.

Went to a gynecologist and she said she can't tell and wants me to do an transvaginal ultrasound. But i feel fine now.

Is this an early pregnancy symptom or something wrong with my body? Should i do the ultrasound?

submitted by /u/im_a_sad_hooman
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