When period goes off

So this time when I had my monthly it lasted the normal 4/5 days ... so today I didn’t wear a pad because to my knowledge it was off ..took a nap woke up to go pee TMI (blood in my sleeping shorts) took a shower put a pad on...hours later went to pee (nothing on my pad) but when I wipe its light pink & brown... I have a baby so I know what implantation bleeding is & it looked similar ...my question is have this ever happened to you . & some advice. Thank you 👍🏽