I’m supposed to get my period in about 3 days, and this afternoon I had sex (unprotected save for BC) and about an hour later wiped and noticed pink watery spotting/blood. Is this start of period or should I be concerned about implantation bleeding? I’ve never caught my period at the start where it wasn’t a heavier and darker flow, but also I suppose it could be watered down by other substances/affected by us having sex?

Just looking for reassurance as I live in a very restrictive state for women’s health and am not looking to get pregnant atm.