Trying to conceive ?
Can implantation bleeding be the same day of your period? I'm having period but slightly lesser and lighter than normal period.
It could be period or implantation. People always confused between implantation and period. You can read more about it here, just to clarify: https://my.theasianparent.com/tanda-hamil/
Upt test can get positive already if u test on period day. If its positive, then it might be implantation. If upt negative, it might be your menstruation