So about 2 months ago I had this brown stuff on the crotch of my undies. It didn't continue though. So I just thought I pooed myself (LOL). So 1/2 a month ago I had the same thing! Mixed with yellow and almost white discharge(I have been having discharge for 6 to 8 months now) . I thought I pooed myself again, but when I looked at my genitals with a mirror and on the sides right next to my vagina there was this thing again! It was dried up also. I never told my mom. What is it? Is it an infection?

This could be just normal discharge. Discharge can be clear, white, brown or yellow. You might have a yeast infection which can be taken care. Let your mom know or make an appointment with your dr. But I wouldn't be nervous, every girl has vaginal discharge.