Hi! So I had my period last on may 12 and it ended on the 19th. i had unprotected sex on the 22nd and the 25th. I have not missed a period yet because it is not yet due, but i have had this discharge since sunday june 5. i went to the bathroom and when i wiped it was red - like my period was starting, there was a fair amount of blood but not tons - more than spotting. it turned to brownish discharge that i have had for 5 das now, sometimes leaving marks in my underwear. I have never experienced this before and am not sure if it is cause for concern. my periods are generally about 4-5 weeks apart, last for 6-7 days. i have had one sexual partner and am 18 years old. thank you for your time!