brown spotting cause of placenta??

vee • momsy to 12 y.o. starting all over again in March. 👶🏻🍼

just went pee and had light brown on the tissue. took a shower and there was a lot of brown blood. i know it can either be completely normal or the start of a nightmare :( please assure me ladies this is normal.. i never bled with my first. ive read that its the placenta making way and pushing it out. has anyone else heard this?