is this normal

im 18 years old, no birth control and 11 DAYS EARLY ON MY PERIOD, it’s so weird to me because my boyfriend was the one that noticed a stain on my WHITE JEANS and when I went to check...BLOOD. but it wasn’t your regular red bearly starting blood it was more like brown ending your period and now i’m on day 3 and it’s very weird for me since I didn’t have NO SYMPTOMS! it’s crazy for me since i’m not considering it a “period” it’s not a heavy flow or constantly bleeding it’s just “hey here i am but i’m

not but i am tho”, is this normal 😫 I feel very stupid asking but never has this happened to me