Period started but no blood?

I started earlier today, with all my normal symptoms and the blood was a light red and some hints of brown, which is always the sign I started. Well, normally I would have bled a lot more than I have today on my first day. I haven’t bled that much at all, but I know that I started. I’m not pregnant, still a virgin! So no implantation bleeding. My mom told me it’s just my uterine wall now shredding, and blood will come when ready? But I already did start? Pretty dang confused lol.