text: how long should your period last if you had intercourse during your period's last days? i had intercourse with my significant other two weeks ago during my period's last days. since then, i appear to still be during my period, but i believe it's taken too long. it has the color and texture, but i am afraid it might be something else. its ur period. he prolly cleaned out ur insides when u guys had sex and all the remainder of ur period is coming out. like when u use a plunger in the toilet