Implant bleeding?

I have miscarried in the past, once. With that pregnancy I had implant bleeding at the time my cycle was due. At the time I was not tracking my cycles, they came when they came. I have endo so the exactness of a start date never mattered to me. That pregnancy happened in 2014. I miscarried at 8 weeks. Flash forward to this year and after doing research my husband and I decided to track my cycles and use it as a form of birth control. Everything’s been greats for months. I made peace with both having any bio children.. I’ve been starting my period monthly on the day or the day after my period predictions. This month I am 3-4 days late. I ovulated last month. I thought we were careful but now I’m not sure if my bodies playing an endo trick or if I’m pregnant again. Yesterday, so day 2-3 past period prediction I had a small drop of fresh blood. Usually my cycles start with “old blood” that’s more dark and not fresh looking. Then this morning I had the faintest of smears with my morning pee. Again it was red/pink, not old looking and nothing today since then. My breast have been sore for several days now but they’re usually sore with my ovulation and with my period. So IDK what’s to think. I haven’t had cramping with the spot or smear. I hate when my body does this. I hate not knowing if something really is a sign or if I’m just wanting it to be. That’s one of the biggest reasons I didn’t want to try for another pregnancy. I was driving myself nuts but now after months of everything being on time and my “normal” suddenly I’m not. Anyone have any insight? I really just needed to purge my thoughts/feels. Sorry it’s so long.