Excuse me for such an intimate question, Do Lochia have a smell? How…

Excuse me for such an intimate question, Do Lochia have a smell? How long do they last? After childbirth, 12 days passed, there were ruptures, stitches haven't all come off yet, now brown-red discharge is not very abundant but there is a nasty smell and I go to the toilet like I have cystitis. I'm going to see a gynecologist tomorrow, so I'm nervous about the examination on the chair ? I read something similar online, my hair stood up in shock.?