Hello. I am 13 and never had a period. A few days ago I had some discharge but I wasn't sure if it was brown because my panties did not have a white strip, just dark red like the rest of the panties. So I wasn't sure if it was just tinted from that or not. After this I had white panties and everything seems to be the same color as usual, not brown after about 3-4 days. Was this my period? I really need to know as I'm going swimming in a few days.